fix: Handle correctly issues with an empty body (#34)

* fix: Handle correctly issues with an empty body

Fixes: #33

* Update fixtures/blank/issue.js

Co-authored-by: Gregor Martynus <39992+gr2m@users.noreply.github.com>

Co-authored-by: Stefan Buck <github@stefanbuck.com>
Co-authored-by: Gregor Martynus <39992+gr2m@users.noreply.github.com>

fixtures/blank/expected.json

@@ -0,0 +1 @@
+{}

fixtures/blank/form.yml

@@ -0,0 +1,9 @@
+body:
+  - type: textarea
+    id: textarea-one
+    attributes:
+      label: My textarea input
+  - type: textarea
+    id: textarea-two
+    attributes:
+      label: Another textarea input

fixtures/blank/issue.js

@@ -0,0 +1,5 @@
+module.exports = {
+  issue: {
+    body: null,
+  },
+};

index.js

@@ -39,7 +39,7 @@ async function run(env, eventPayload, fs, core) {
   }
 
   let result;
-  const body = eventPayload.issue.body;
+  const body = eventPayload.issue.body || '';
   const idMapping = getIDsFromIssueTemplate(form);
 
   function toKey(str) {

test.spec.js

@@ -106,3 +106,53 @@ it("multiple paragraphs", () => {
 
   run(env, eventPayload, fs, core);
 });
+
+it("blank", () => {
+  const expectedOutput = require("./fixtures/blank/expected.json");
+  const expectedOutputJson = JSON.stringify(expectedOutput, null, 2);
+
+  // mock ENV
+  const env = {
+    HOME: "<home path>",
+  };
+
+  // mock event payload
+  const eventPayload = require("./fixtures/blank/issue");
+
+  // mock fs
+  const fs = {
+    readFileSync(path, encoding) {
+      expect(path).toBe("<template-path>");
+      expect(encoding).toBe("utf8");
+      return readFileSync("fixtures/blank/form.yml", "utf-8");
+    },
+    writeFileSync(path, content) {
+      expect(path).toBe("<home path>/issue-parser-result.json");
+      expect(content).toBe(expectedOutputJson);
+    },
+  };
+
+  // mock core
+  const core = {
+    getInput(inputName) {
+      expect(inputName).toBe("template-path");
+      return "<template-path>";
+    },
+    setOutput(outputName, outputValue) {
+      if (outputName === "jsonString") {
+        expect(outputValue).toBe(expectedOutputJson);
+        return;
+      }
+
+      if (outputName.startsWith("issueparser_")) {
+        const key = outputName.substr("issueparser_".length);
+        expect(Object.keys(expectedOutput)).toContain(key);
+
+        expect(outputValue).toBe(expectedOutput[key]);
+        return;
+      }
+    },
+  };
+
+  run(env, eventPayload, fs, core);
+});