add tests

lib/config-utils.js

@@ -287,6 +287,15 @@ exports.getConfigFileDirectoryGivenMessage = getConfigFileDirectoryGivenMessage;
 function getConfigFilePropertyError(configFile, property, error) {
     return 'The configuration file "' + configFile + '" is invalid: property "' + property + '" ' + error;
 }
+function getNoLanguagesError() {
+    return "Did not detect any languages to analyze. " +
+        "Please update input in workflow or check that GitHub detects the correct languages in your repository.";
+}
+exports.getNoLanguagesError = getNoLanguagesError;
+function getUnknownLanguagesError(languages) {
+    return "Did not recognise the following languages: " + languages.join(', ');
+}
+exports.getUnknownLanguagesError = getUnknownLanguagesError;
 /**
  * Gets the set of languages in the current repository
  */
@@ -354,8 +363,7 @@ async function getLanguages() {
     // If the languages parameter was not given and no languages were
     // detected then fail here as this is a workflow configuration error.
     if (languages.length === 0) {
-        throw new Error("Did not detect any languages to analyze. " +
-            "Please update input in workflow or check that GitHub detects the correct languages in your repository.");
+        throw new Error(getNoLanguagesError());
     }
     // Make sure they are supported
     const checkedLanguages = [];
@@ -376,7 +384,7 @@ async function getLanguages() {
         }
     }
     if (unknownLanguages.length > 0) {
-        throw new Error("Did not recognise the following languages: " + unknownLanguages.join(', '));
+        throw new Error(getUnknownLanguagesError(unknownLanguages));
     }
     return checkedLanguages;
 }

lib/config-utils.test.js

@@ -303,6 +303,33 @@ ava_1.default("Invalid format of remote config handled correctly", async (t) =>
         }
     });
 });
+ava_1.default("No detected languages", async (t) => {
+    return await util.withTmpDir(async (tmpDir) => {
+        process.env['RUNNER_TEMP'] = tmpDir;
+        process.env['GITHUB_WORKSPACE'] = tmpDir;
+        try {
+            await configUtils.initConfig();
+            throw new Error('initConfig did not throw error');
+        }
+        catch (err) {
+            t.deepEqual(err, new Error(configUtils.getNoLanguagesError()));
+        }
+    });
+});
+ava_1.default("Unknown languages", async (t) => {
+    return await util.withTmpDir(async (tmpDir) => {
+        process.env['RUNNER_TEMP'] = tmpDir;
+        process.env['GITHUB_WORKSPACE'] = tmpDir;
+        setInput('languages', 'ruby,english');
+        try {
+            await configUtils.initConfig();
+            throw new Error('initConfig did not throw error');
+        }
+        catch (err) {
+            t.deepEqual(err, new Error(configUtils.getUnknownLanguagesError(['ruby', 'english'])));
+        }
+    });
+});
 function doInvalidInputTest(testName, inputFileContents, expectedErrorMessageGenerator) {
     ava_1.default("load invalid input - " + testName, async (t) => {
         return await util.withTmpDir(async (tmpDir) => {