Add ReportCreatorTest

tests-execution-chart-commons/src/test/groovy/io/github/platan/tests_execution_chart/report/ReportCreatorTest.groovy

@@ -0,0 +1,41 @@
+package io.github.platan.tests_execution_chart.report
+
+import io.github.platan.tests_execution_chart.reporters.Logger
+import io.github.platan.tests_execution_chart.reporters.json.JsonConfig
+import spock.lang.Specification
+import spock.lang.Subject
+import spock.lang.TempDir
+
+import java.time.Instant
+
+import static io.github.platan.tests_execution_chart.report.data.TimedTestResult.Type.TEST
+
+class ReportCreatorTest extends Specification {
+
+    @TempDir
+    File baseDir
+    Logger logger = { String message -> println(message) }
+    @Subject
+    ReportCreator reportCreator = new ReportCreator(logger)
+    def configOutputLocation = "my-output-location"
+
+    def "should create report for given formats"() {
+        given:
+        def config = new ReportConfig([new JsonConfig(true, configOutputLocation)], new ReportConfig.Marks(), false)
+        def report = new TestExecutionScheduleReportBuilder()
+                .addResult('class', 'test', toEpochMilli('2023-03-10T19:00:02Z'), toEpochMilli('2023-03-10T19:00:05Z'), 'passed', TEST)
+                .addMark('mark1', toEpochMilli('2023-03-10T19:00:05Z')).build()
+
+        when:
+        reportCreator.createReports(report, config, baseDir, 'my-task')
+
+        then:
+        def reportFile = new File(baseDir, "$configOutputLocation/my-task.json")
+        reportFile.exists()
+    }
+
+
+    private static long toEpochMilli(String instant) {
+        Instant.parse(instant).toEpochMilli()
+    }
+}