Add a few tests for invalid OS or platform

Author: samrocketman

src/main/groovy/net/gleske/jervis/lang/MultiPlatformValidator.groovy

@@ -319,6 +319,22 @@ getGeneratorFromJervis(yaml: '', folder_listing: []
             }
             // TODO verify neither os nor platform are named as keys.
         }
+        // If jenkins.platform is provided, all values MUST be known platforms
+        List user_platforms = YamlOperator.getObjectValue(jervis_yaml, 'jenkins.platform', [[], '']).with {
+            (it in List) ? it : [it]
+        }.findAll { it instanceof String && it.trim() }
+        List unknown_platforms = user_platforms - this.known_platforms
+        if(unknown_platforms) {
+            errors << "jenkins.platform contains unknown platforms: ${unknown_platforms.inspect()}.  Known platforms: ${this.known_platforms.inspect()}"
+        }
+        // If jenkins.os is provided, all values MUST be known operating systems
+        List user_os = YamlOperator.getObjectValue(jervis_yaml, 'jenkins.os', [[], '']).with {
+            (it in List) ? it : [it]
+        }.findAll { it instanceof String && it.trim() }
+        List unknown_os = user_os - this.known_operating_systems
+        if(unknown_os) {
+            errors << "jenkins.os contains unknown operating systems: ${unknown_os.inspect()}.  Known operating systems: ${this.known_operating_systems.inspect()}"
+        }
         if(errors) {
             // TODO MultiPlatformException
             throw new Exception("Multi-platform YAML validation has failed:\n\n  - " + errors.sort().unique().join('\n  - ') + "\n\nSee one or more errors above.")

src/test/groovy/net/gleske/jervis/lang/MultiPlatformValidatorTest.groovy

@@ -322,6 +322,30 @@ class MultiPlatformValidatorTest extends GroovyTestCase {
             platforms.validateJervisYaml(jervisYaml)
         }
     }
+    @Test public void test_MultiPlatformValidator_validateJervisYaml_invalid_platform_value() {
+        loadFullMultiPlatformResources()
+        Map jervisYaml = [
+            language: 'groovy',
+            jenkins: [
+                platform: ['x86_64', 'foo']  // 'foo' is not a valid platform
+            ]
+        ]
+        shouldFail(Exception) {
+            platforms.validateJervisYaml(jervisYaml)
+        }
+    }
+    @Test public void test_MultiPlatformValidator_validateJervisYaml_invalid_os_value() {
+        loadFullMultiPlatformResources()
+        Map jervisYaml = [
+            language: 'groovy',
+            jenkins: [
+                os: ['alpine3', 'foo']  // 'foo' is not a valid os
+            ]
+        ]
+        shouldFail(Exception) {
+            platforms.validateJervisYaml(jervisYaml)
+        }
+    }
     //serialization tests
     @Test public void test_MultiPlatformValidator_serialization() {
         loadFullMultiPlatformResources()