diff --git a/.gitignore b/.gitignore
index 32858aa..8016159 100644
--- a/.gitignore
+++ b/.gitignore
@@ -10,3 +10,49 @@
 
 # virtual machine crash logs, see http://www.java.com/en/download/help/error_hotspot.xml
 hs_err_pid*
+
+# Covers JetBrains IDEs: IntelliJ, RubyMine, PhpStorm, AppCode, PyCharm, CLion, Android Studio and Webstorm
+# Reference: https://intellij-support.jetbrains.com/hc/en-us/articles/206544839
+
+# User-specific stuff:
+.idea/workspace.xml
+.idea/tasks.xml
+
+# Sensitive or high-churn files:
+.idea/dataSources.ids
+.idea/dataSources.xml
+.idea/dataSources.local.xml
+.idea/sqlDataSources.xml
+.idea/dynamic.xml
+.idea/uiDesigner.xml
+
+# Gradle:
+.idea/gradle.xml
+.idea/libraries
+
+# Mongo Explorer plugin:
+.idea/mongoSettings.xml
+
+## File-based project format:
+*.iws
+
+## Plugin-specific files:
+
+# IntelliJ
+/out/
+
+# mpeltonen/sbt-idea plugin
+.idea_modules/
+
+# JIRA plugin
+atlassian-ide-plugin.xml
+
+# Crashlytics plugin (for Android Studio and IntelliJ)
+com_crashlytics_export_strings.xml
+crashlytics.properties
+crashlytics-build.properties
+fabric.properties
+
+
+.gradle/*
+.idea/*
\ No newline at end of file
diff --git a/build.gradle b/build.gradle
new file mode 100644
index 0000000..dbded78
--- /dev/null
+++ b/build.gradle
@@ -0,0 +1,20 @@
+group 'com.github.mydogtom'
+version '0.1'
+
+apply plugin: 'java'
+
+sourceCompatibility = 1.8
+
+repositories {
+    jcenter()
+}
+
+def RXJAVA_VERSION = '1.2.1'
+
+dependencies {
+    compile "io.reactivex:rxjava:$RXJAVA_VERSION"
+
+    testCompile 'junit:junit:4.12'
+    testCompile "io.reactivex:rxjava:$RXJAVA_VERSION"
+
+}
diff --git a/gradle/wrapper/gradle-wrapper.properties b/gradle/wrapper/gradle-wrapper.properties
new file mode 100644
index 0000000..df9c589
--- /dev/null
+++ b/gradle/wrapper/gradle-wrapper.properties
@@ -0,0 +1,6 @@
+#Tue Oct 18 18:07:37 CEST 2016
+distributionBase=GRADLE_USER_HOME
+distributionPath=wrapper/dists
+zipStoreBase=GRADLE_USER_HOME
+zipStorePath=wrapper/dists
+distributionUrl=https\://services.gradle.org/distributions/gradle-3.1-all.zip
diff --git a/gradlew b/gradlew
new file mode 100755
index 0000000..27309d9
--- /dev/null
+++ b/gradlew
@@ -0,0 +1,164 @@
+#!/usr/bin/env bash
+
+##############################################################################
+##
+##  Gradle start up script for UN*X
+##
+##############################################################################
+
+# Attempt to set APP_HOME
+# Resolve links: $0 may be a link
+PRG="$0"
+# Need this for relative symlinks.
+while [ -h "$PRG" ] ; do
+    ls=`ls -ld "$PRG"`
+    link=`expr "$ls" : '.*-> \(.*\)$'`
+    if expr "$link" : '/.*' > /dev/null; then
+        PRG="$link"
+    else
+        PRG=`dirname "$PRG"`"/$link"
+    fi
+done
+SAVED="`pwd`"
+cd "`dirname \"$PRG\"`/" >/dev/null
+APP_HOME="`pwd -P`"
+cd "$SAVED" >/dev/null
+
+APP_NAME="Gradle"
+APP_BASE_NAME=`basename "$0"`
+
+# Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script.
+DEFAULT_JVM_OPTS=""
+
+# Use the maximum available, or set MAX_FD != -1 to use that value.
+MAX_FD="maximum"
+
+warn ( ) {
+    echo "$*"
+}
+
+die ( ) {
+    echo
+    echo "$*"
+    echo
+    exit 1
+}
+
+# OS specific support (must be 'true' or 'false').
+cygwin=false
+msys=false
+darwin=false
+nonstop=false
+case "`uname`" in
+  CYGWIN* )
+    cygwin=true
+    ;;
+  Darwin* )
+    darwin=true
+    ;;
+  MINGW* )
+    msys=true
+    ;;
+  NONSTOP* )
+    nonstop=true
+    ;;
+esac
+
+CLASSPATH=$APP_HOME/gradle/wrapper/gradle-wrapper.jar
+
+# Determine the Java command to use to start the JVM.
+if [ -n "$JAVA_HOME" ] ; then
+    if [ -x "$JAVA_HOME/jre/sh/java" ] ; then
+        # IBM's JDK on AIX uses strange locations for the executables
+        JAVACMD="$JAVA_HOME/jre/sh/java"
+    else
+        JAVACMD="$JAVA_HOME/bin/java"
+    fi
+    if [ ! -x "$JAVACMD" ] ; then
+        die "ERROR: JAVA_HOME is set to an invalid directory: $JAVA_HOME
+
+Please set the JAVA_HOME variable in your environment to match the
+location of your Java installation."
+    fi
+else
+    JAVACMD="java"
+    which java >/dev/null 2>&1 || die "ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH.
+
+Please set the JAVA_HOME variable in your environment to match the
+location of your Java installation."
+fi
+
+# Increase the maximum file descriptors if we can.
+if [ "$cygwin" = "false" -a "$darwin" = "false" -a "$nonstop" = "false" ] ; then
+    MAX_FD_LIMIT=`ulimit -H -n`
+    if [ $? -eq 0 ] ; then
+        if [ "$MAX_FD" = "maximum" -o "$MAX_FD" = "max" ] ; then
+            MAX_FD="$MAX_FD_LIMIT"
+        fi
+        ulimit -n $MAX_FD
+        if [ $? -ne 0 ] ; then
+            warn "Could not set maximum file descriptor limit: $MAX_FD"
+        fi
+    else
+        warn "Could not query maximum file descriptor limit: $MAX_FD_LIMIT"
+    fi
+fi
+
+# For Darwin, add options to specify how the application appears in the dock
+if $darwin; then
+    GRADLE_OPTS="$GRADLE_OPTS \"-Xdock:name=$APP_NAME\" \"-Xdock:icon=$APP_HOME/media/gradle.icns\""
+fi
+
+# For Cygwin, switch paths to Windows format before running java
+if $cygwin ; then
+    APP_HOME=`cygpath --path --mixed "$APP_HOME"`
+    CLASSPATH=`cygpath --path --mixed "$CLASSPATH"`
+    JAVACMD=`cygpath --unix "$JAVACMD"`
+
+    # We build the pattern for arguments to be converted via cygpath
+    ROOTDIRSRAW=`find -L / -maxdepth 1 -mindepth 1 -type d 2>/dev/null`
+    SEP=""
+    for dir in $ROOTDIRSRAW ; do
+        ROOTDIRS="$ROOTDIRS$SEP$dir"
+        SEP="|"
+    done
+    OURCYGPATTERN="(^($ROOTDIRS))"
+    # Add a user-defined pattern to the cygpath arguments
+    if [ "$GRADLE_CYGPATTERN" != "" ] ; then
+        OURCYGPATTERN="$OURCYGPATTERN|($GRADLE_CYGPATTERN)"
+    fi
+    # Now convert the arguments - kludge to limit ourselves to /bin/sh
+    i=0
+    for arg in "$@" ; do
+        CHECK=`echo "$arg"|egrep -c "$OURCYGPATTERN" -`
+        CHECK2=`echo "$arg"|egrep -c "^-"`                                 ### Determine if an option
+
+        if [ $CHECK -ne 0 ] && [ $CHECK2 -eq 0 ] ; then                    ### Added a condition
+            eval `echo args$i`=`cygpath --path --ignore --mixed "$arg"`
+        else
+            eval `echo args$i`="\"$arg\""
+        fi
+        i=$((i+1))
+    done
+    case $i in
+        (0) set -- ;;
+        (1) set -- "$args0" ;;
+        (2) set -- "$args0" "$args1" ;;
+        (3) set -- "$args0" "$args1" "$args2" ;;
+        (4) set -- "$args0" "$args1" "$args2" "$args3" ;;
+        (5) set -- "$args0" "$args1" "$args2" "$args3" "$args4" ;;
+        (6) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" ;;
+        (7) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" ;;
+        (8) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" "$args7" ;;
+        (9) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" "$args7" "$args8" ;;
+    esac
+fi
+
+# Split up the JVM_OPTS And GRADLE_OPTS values into an array, following the shell quoting and substitution rules
+function splitJvmOpts() {
+    JVM_OPTS=("$@")
+}
+eval splitJvmOpts $DEFAULT_JVM_OPTS $JAVA_OPTS $GRADLE_OPTS
+JVM_OPTS[${#JVM_OPTS[*]}]="-Dorg.gradle.appname=$APP_BASE_NAME"
+
+exec "$JAVACMD" "${JVM_OPTS[@]}" -classpath "$CLASSPATH" org.gradle.wrapper.GradleWrapperMain "$@"
diff --git a/gradlew.bat b/gradlew.bat
new file mode 100644
index 0000000..832fdb6
--- /dev/null
+++ b/gradlew.bat
@@ -0,0 +1,90 @@
+@if "%DEBUG%" == "" @echo off
+@rem ##########################################################################
+@rem
+@rem  Gradle startup script for Windows
+@rem
+@rem ##########################################################################
+
+@rem Set local scope for the variables with windows NT shell
+if "%OS%"=="Windows_NT" setlocal
+
+set DIRNAME=%~dp0
+if "%DIRNAME%" == "" set DIRNAME=.
+set APP_BASE_NAME=%~n0
+set APP_HOME=%DIRNAME%
+
+@rem Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script.
+set DEFAULT_JVM_OPTS=
+
+@rem Find java.exe
+if defined JAVA_HOME goto findJavaFromJavaHome
+
+set JAVA_EXE=java.exe
+%JAVA_EXE% -version >NUL 2>&1
+if "%ERRORLEVEL%" == "0" goto init
+
+echo.
+echo ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH.
+echo.
+echo Please set the JAVA_HOME variable in your environment to match the
+echo location of your Java installation.
+
+goto fail
+
+:findJavaFromJavaHome
+set JAVA_HOME=%JAVA_HOME:"=%
+set JAVA_EXE=%JAVA_HOME%/bin/java.exe
+
+if exist "%JAVA_EXE%" goto init
+
+echo.
+echo ERROR: JAVA_HOME is set to an invalid directory: %JAVA_HOME%
+echo.
+echo Please set the JAVA_HOME variable in your environment to match the
+echo location of your Java installation.
+
+goto fail
+
+:init
+@rem Get command-line arguments, handling Windows variants
+
+if not "%OS%" == "Windows_NT" goto win9xME_args
+if "%@eval[2+2]" == "4" goto 4NT_args
+
+:win9xME_args
+@rem Slurp the command line arguments.
+set CMD_LINE_ARGS=
+set _SKIP=2
+
+:win9xME_args_slurp
+if "x%~1" == "x" goto execute
+
+set CMD_LINE_ARGS=%*
+goto execute
+
+:4NT_args
+@rem Get arguments from the 4NT Shell from JP Software
+set CMD_LINE_ARGS=%$
+
+:execute
+@rem Setup the command line
+
+set CLASSPATH=%APP_HOME%\gradle\wrapper\gradle-wrapper.jar
+
+@rem Execute Gradle
+"%JAVA_EXE%" %DEFAULT_JVM_OPTS% %JAVA_OPTS% %GRADLE_OPTS% "-Dorg.gradle.appname=%APP_BASE_NAME%" -classpath "%CLASSPATH%" org.gradle.wrapper.GradleWrapperMain %CMD_LINE_ARGS%
+
+:end
+@rem End local scope for the variables with windows NT shell
+if "%ERRORLEVEL%"=="0" goto mainEnd
+
+:fail
+rem Set variable GRADLE_EXIT_CONSOLE if you need the _script_ return code instead of
+rem the _cmd.exe /c_ return code!
+if  not "" == "%GRADLE_EXIT_CONSOLE%" exit 1
+exit /b 1
+
+:mainEnd
+if "%OS%"=="Windows_NT" endlocal
+
+:omega
diff --git a/settings.gradle b/settings.gradle
new file mode 100644
index 0000000..7358688
--- /dev/null
+++ b/settings.gradle
@@ -0,0 +1,3 @@
+rootProject.name = 'rxtestwrapper'
+
+
diff --git a/src/main/java/com/github/mydogtom/rxtestwrapper/RxTestWrapper.java b/src/main/java/com/github/mydogtom/rxtestwrapper/RxTestWrapper.java
new file mode 100644
index 0000000..702a747
--- /dev/null
+++ b/src/main/java/com/github/mydogtom/rxtestwrapper/RxTestWrapper.java
@@ -0,0 +1,142 @@
+package com.github.mydogtom.rxtestwrapper;
+
+import java.util.List;
+
+import rx.Completable;
+import rx.Observable;
+import rx.Single;
+import rx.observables.BlockingObservable;
+import rx.observers.TestSubscriber;
+
+/** A wrapper around {@link TestSubscriber} that provides a fluent API */
+public class RxTestWrapper<T> {
+    private final TestSubscriber<T> testSubscriber;
+
+    public RxTestWrapper(Observable<T> observable) {
+        testSubscriber = TestSubscriber.create();
+        observable.subscribe(testSubscriber);
+    }
+
+    public RxTestWrapper(BlockingObservable<T> blockingObservable) {
+        testSubscriber = TestSubscriber.create();
+        blockingObservable.subscribe(testSubscriber);
+    }
+
+    public static <T> RxTestWrapper<T> assertThat(Observable<T> observable) {
+        return new RxTestWrapper<>(observable);
+    }
+
+    public static <T> RxTestWrapper<T> assertThat(Single<T> single) {
+        return new RxTestWrapper<>(single.toObservable());
+    }
+
+    public static <T> RxTestWrapper<T> assertThat(Completable completable) {
+        return new RxTestWrapper<>(completable.toObservable());
+    }
+
+    public static <T> RxTestWrapper<T> assertThat(BlockingObservable<T> blockingObservable) {
+        return new RxTestWrapper<>(blockingObservable);
+    }
+
+    /** Wrapper arround {@link TestSubscriber#assertReceivedOnNext(List)} */
+    public final RxTestWrapper<T> receivedOnNext(List<T> items) {
+        testSubscriber.assertReceivedOnNext(items);
+        return this;
+    }
+
+    /** Wrapper around {@link TestSubscriber#assertTerminalEvent()} */
+    public final RxTestWrapper<T> hasTerminalEvent() {
+        testSubscriber.assertTerminalEvent();
+        return this;
+    }
+
+    /** Wrapper around {@link TestSubscriber#assertUnsubscribed()} */
+    public final RxTestWrapper<T> unsubscribed() {
+        testSubscriber.assertUnsubscribed();
+        return this;
+    }
+
+    /** Wraps {@link TestSubscriber#assertNoErrors()} */
+    public final RxTestWrapper<T> hasNoErrors() {
+        testSubscriber.assertNoErrors();
+        return this;
+    }
+
+    /** Wraps {@link TestSubscriber#assertCompleted()} */
+    public final RxTestWrapper<T> completed() {
+        testSubscriber.assertCompleted();
+        return this;
+    }
+
+    /** Wraps {@link TestSubscriber#assertNotCompleted()} */
+    public final RxTestWrapper<T> notCompleted() {
+        testSubscriber.assertNotCompleted();
+        return this;
+    }
+
+    /** Wraps {@link TestSubscriber#assertError(Class)} */
+    public final RxTestWrapper<T> hasError(Class<? extends Throwable> clazz) {
+        testSubscriber.assertError(clazz);
+        return this;
+    }
+
+    /**
+     * Wraps {@link TestSubscriber#assertError(Throwable)}
+     */
+    public final RxTestWrapper<T> hasError(Throwable throwable) {
+        testSubscriber.assertError(throwable);
+        return this;
+    }
+
+    /** Wraps {@link TestSubscriber#assertNoTerminalEvent()} */
+    public final RxTestWrapper<T> hasNoTerminalEvent() {
+        testSubscriber.assertNoTerminalEvent();
+        return this;
+    }
+
+    /** Wraps {@link TestSubscriber#assertNoValues()} */
+    public final RxTestWrapper<T> hasNoValues() {
+        testSubscriber.assertNoValues();
+        return this;
+    }
+
+    /** Wraps {@link TestSubscriber#assertValueCount(int)} */
+    public final RxTestWrapper<T> hasValueCount(int i) {
+        testSubscriber.assertValueCount(i);
+        return this;
+    }
+
+    /** Wraps {@link TestSubscriber#assertValues(Object[])} */
+    public final RxTestWrapper<T> hasValues(T... values) {
+        testSubscriber.assertValues(values);
+        return this;
+    }
+
+    /** Wraps {@link TestSubscriber#assertValue(Object)} */
+    public final RxTestWrapper<T> hasValue(T value) {
+        testSubscriber.assertValue(value);
+        return this;
+    }
+
+    /** Wraps {@link TestSubscriber#assertValuesAndClear(Object, Object[])} */
+    public final RxTestWrapper<T> hasValuesAndClear(T expectedFirstValue, T... expectedRestValues) {
+        testSubscriber.assertValuesAndClear(expectedFirstValue, expectedRestValues);
+        return this;
+    }
+
+    /**
+     * Asserts that there is only a single received onNext event and that emission exactly specific type.
+     * @param type
+     * expected type
+     */
+    public final RxTestWrapper<T> valueIsExactlyInstanceOf(Class<? extends T> type) {
+        testSubscriber.assertValueCount(1);
+        T value = testSubscriber.getOnNextEvents().get(0);
+        if (!type.equals(value.getClass())) {
+            throw new AssertionError(String.format("Expected value to be instance of %s, \nbut was: %s",
+                    type.getName(), value.getClass().getName()));
+        }
+        return this;
+    }
+}
+
diff --git a/src/test/java/com/github/mydogtom/rxtestwrapper/RxTestWrapperTest.java b/src/test/java/com/github/mydogtom/rxtestwrapper/RxTestWrapperTest.java
new file mode 100644
index 0000000..71e4894
--- /dev/null
+++ b/src/test/java/com/github/mydogtom/rxtestwrapper/RxTestWrapperTest.java
@@ -0,0 +1,196 @@
+package com.github.mydogtom.rxtestwrapper;
+
+import org.junit.Test;
+import rx.Observable;
+import rx.subjects.BehaviorSubject;
+
+import java.util.Arrays;
+import java.util.Collections;
+
+import static com.github.mydogtom.rxtestwrapper.RxTestWrapper.assertThat;
+
+public class RxTestWrapperTest {
+    @Test
+    public void shouldSucceedReceivedOnNext() {
+        assertThat(Observable.just("test"))
+                .receivedOnNext(Collections.singletonList("test"));
+    }
+
+    @Test(expected = AssertionError.class)
+    public void shouldFailReceivedOnNext() {
+        assertThat(Observable.empty())
+                .receivedOnNext(Collections.singletonList("test"));
+    }
+
+    @Test
+    public void shouldSucceedHasTerminalEvent() {
+        assertThat(Observable.empty())
+                .hasTerminalEvent();
+    }
+
+    @Test(expected = AssertionError.class)
+    public void shouldFailHasTerminalEvent() {
+        assertThat(Observable.never())
+                .hasTerminalEvent();
+    }
+
+    @Test
+    public void shouldSucceedUnsubscribed() {
+        assertThat(Observable.empty())
+                .unsubscribed();
+    }
+
+    @Test(expected = AssertionError.class)
+    public void shouldFailUnsubscribed() {
+        assertThat(Observable.never())
+                .unsubscribed();
+    }
+
+    @Test
+    public void shouldSucceedHasNoErrors() {
+        assertThat(Observable.empty())
+                .hasNoErrors();
+    }
+
+    @Test(expected = AssertionError.class)
+    public void shouldFailHasNoErrors() {
+        assertThat(Observable.error(new Throwable()))
+                .hasNoErrors();
+    }
+
+    @Test
+    public void shouldSucceedCompleted() {
+        assertThat(Observable.just("test"))
+                .completed();
+    }
+
+    @Test(expected = AssertionError.class)
+    public void shouldFailCompleted() {
+        assertThat(Observable.never())
+                .completed();
+    }
+
+    @Test
+    public void shouldSucceedNotCompleted() throws Exception {
+        assertThat(Observable.never())
+                .notCompleted();
+    }
+
+    @Test(expected = AssertionError.class)
+    public void shouldFailNotCompleted() throws Exception {
+        assertThat(Observable.empty())
+                .notCompleted();
+    }
+
+    @Test
+    public void shouldSucceedHasErrorByType() throws Exception {
+        assertThat(Observable.error(new IllegalArgumentException()))
+                .hasError(IllegalArgumentException.class);
+    }
+
+    @Test(expected = AssertionError.class)
+    public void shouldFailHasErrorByType() throws Exception {
+        assertThat(Observable.just("test"))
+                .hasError(Throwable.class);
+    }
+
+    @Test
+    public void shouldSucceedHasError() throws Exception {
+        IllegalArgumentException exception = new IllegalArgumentException();
+        assertThat(Observable.error(exception))
+                .hasError(exception);
+    }
+    @Test(expected = AssertionError.class)
+    public void shouldFailHasError() throws Exception {
+        assertThat(Observable.error(new IllegalArgumentException()))
+                .hasError(new IllegalArgumentException());
+    }
+
+    @Test
+    public void shouldSucceedHasNoTerminalEvent() throws Exception {
+        assertThat(Observable.never())
+                .hasNoTerminalEvent();
+    }
+
+    @Test(expected = AssertionError.class)
+    public void shouldFailHasNoTerminalEvent() throws Exception {
+        assertThat(Observable.empty())
+                .hasNoTerminalEvent();
+    }
+
+    @Test
+    public void shouldSucceedHasNoValues() throws Exception {
+        assertThat(Observable.empty())
+                .hasNoValues();
+    }
+
+    @Test(expected = AssertionError.class)
+    public void shouldFailHasNoValues() throws Exception {
+        assertThat(Observable.just("test"))
+                .hasNoValues();
+    }
+
+    @Test
+    public void shouldSucceedHasValueCount() throws Exception {
+        assertThat(Observable.from(Arrays.asList(1, 2, 3)))
+                .hasValueCount(3);
+    }
+
+    @Test(expected = AssertionError.class)
+    public void shouldFailHasValueCount() throws Exception {
+        assertThat(Observable.from(Arrays.asList(1, 2, 3)))
+                .hasValueCount(0);
+    }
+
+    @Test
+    public void shouldSucceedHasValues() throws Exception {
+        assertThat(Observable.from(Arrays.asList(1, 2, 3)))
+                .hasValues(1, 2, 3);
+    }
+
+    @Test(expected = AssertionError.class)
+    public void shouldFailHasValues() throws Exception {
+        assertThat(Observable.from(Arrays.asList(1, 2, 3)))
+                .hasValues(3, 2, 1);
+    }
+
+    @Test
+    public void shouldSucceedHasValue() throws Exception {
+        assertThat(Observable.just("test"))
+                .hasValue("test");
+    }
+
+    @Test(expected = AssertionError.class)
+    public void shouldFailHasValue() throws Exception {
+        assertThat(Observable.just("test"))
+                .hasValue("another string");
+    }
+
+    @Test
+    public void shouldSucceedHasValuesAndClear() throws Exception {
+        BehaviorSubject<String> subject = BehaviorSubject.create("first item");
+        RxTestWrapper<String> assertion = assertThat(subject)
+                .hasValuesAndClear("first item");
+        subject.onNext("second value");
+        assertion.hasValueCount(1);
+    }
+
+    @Test(expected = AssertionError.class)
+    public void shouldFailHasValuesAndClear() throws Exception {
+        assertThat(Observable.just("test"))
+                .hasValuesAndClear("anther string");
+    }
+
+    @Test
+    public void shouldSucceedValueIsExactlyInstanceOf() throws Exception {
+        assertThat(Observable.<Throwable>just(new IllegalArgumentException()))
+                .valueIsExactlyInstanceOf(IllegalArgumentException.class);
+    }
+
+    @Test(expected = AssertionError.class)
+    public void shouldFailValueIsExactlyInstanceOf() throws Exception {
+        assertThat(Observable.<Throwable>just(new IllegalArgumentException()))
+                .valueIsExactlyInstanceOf(Throwable.class);
+
+    }
+}
\ No newline at end of file