Added some basic tests to fix behavior

test/org/moodle/ci/versions/WP37.groovy

+package test.org.moodle.ci.versions;
+
+import spock.lang.Specification
+
+class WP37 extends Specification {
+    def "getDefaultBranch returns WORKPLACE_37_LATEST"() {
+        given:
+        def workplaceVersion = new org.moodle.ci.versions.WP37()
+
+        when:
+        def output = workplaceVersion.getDefaultBranch()
+
+        then:
+        assert output == "WORKPLACE_37_LATEST"
+    }
+
+    def "defaultBranch returns WORKPLACE_37_LATEST"() {
+        given:
+        def workplaceVersion = new org.moodle.ci.versions.WP37()
+
+        when:
+        def output = workplaceVersion.defaultBranch
+
+        then:
+        assert output == "WORKPLACE_37_LATEST"
+    }
+
+    def "getPhpVersions"() {
+        given:
+        def workplaceVersion = new org.moodle.ci.versions.WP37()
+
+        when:
+        def output = workplaceVersion.getPhpVersions()
+
+        then:
+        assert output.sort() == ['7.1', '7.2', '7.3'].sort()
+    }
+
+    def "getHighestSupportedVersion is 7.3"() {
+        given:
+        def workplaceVersion = new org.moodle.ci.versions.WP37()
+
+        when:
+        def output = workplaceVersion.getHighestSupportedVersion()
+
+        then:
+        assert output == '7.3'
+    }
+
+    def "getLowestSupportedVersion is 7.1"() {
+        given:
+        def workplaceVersion = new org.moodle.ci.versions.WP37()
+
+        when:
+        def output = workplaceVersion.getLowestSupportedVersion()
+
+        then:
+        assert output == '7.1'
+    }
+
+    def "getDatabases"() {
+        given:
+        def workplaceVersion = new org.moodle.ci.versions.WP37()
+
+        when:
+        def output = workplaceVersion.getDatabases()
+
+        then:
+        assert output.sort() == [
+                "mariadb",
+                "mysqli",
+                "oci",
+                "pgsql",
+                "sqlsrv",
+            ].sort()
+    }
+
+    def "name matches"() {
+        given:
+        def workplaceVersion = new org.moodle.ci.versions.WP37()
+
+        when:
+        def output = workplaceVersion.name
+
+        then:
+        assert output == "37"
+    }
+}

test/org/moodle/ci/versions/WP38.groovy

+package test.org.moodle.ci.versions;
+
+import spock.lang.Specification
+
+class WP38 extends Specification {
+    def "getDefaultBranch returns WORKPLACE_38_LATEST"() {
+        given:
+        def workplaceVersion = new org.moodle.ci.versions.WP38()
+
+        when:
+        def output = workplaceVersion.getDefaultBranch()
+
+        then:
+        assert output == "WORKPLACE_38_LATEST"
+    }
+
+    def "defaultBranch returns WORKPLACE_38_LATEST"() {
+        given:
+        def workplaceVersion = new org.moodle.ci.versions.WP38()
+
+        when:
+        def output = workplaceVersion.defaultBranch
+
+        then:
+        assert output == "WORKPLACE_38_LATEST"
+    }
+
+    def "getPhpVersions"() {
+        given:
+        def workplaceVersion = new org.moodle.ci.versions.WP38()
+
+        when:
+        def output = workplaceVersion.getPhpVersions()
+
+        then:
+        assert output.sort() == ['7.1', '7.2', '7.3'].sort()
+    }
+
+    def "getHighestSupportedVersion is 7.3"() {
+        given:
+        def workplaceVersion = new org.moodle.ci.versions.WP38()
+
+        when:
+        def output = workplaceVersion.getHighestSupportedVersion()
+
+        then:
+        assert output == '7.3'
+    }
+
+    def "getLowestSupportedVersion is 7.1"() {
+        given:
+        def workplaceVersion = new org.moodle.ci.versions.WP38()
+
+        when:
+        def output = workplaceVersion.getLowestSupportedVersion()
+
+        then:
+        assert output == '7.1'
+    }
+
+    def "getDatabases"() {
+        given:
+        def workplaceVersion = new org.moodle.ci.versions.WP38()
+
+        when:
+        def output = workplaceVersion.getDatabases()
+
+        then:
+        assert output.sort() == [
+                "mariadb",
+                "mysqli",
+                "oci",
+                "pgsql",
+                "sqlsrv",
+            ].sort()
+    }
+
+    def "name matches"() {
+        given:
+        def workplaceVersion = new org.moodle.ci.versions.WP38()
+
+        when:
+        def output = workplaceVersion.name
+
+        then:
+        assert output == "38"
+    }
+}