Add simple in-process test reporter for tape output.

test/markdownlint-test-extra.js

@@ -6,6 +6,7 @@ const fs = require("fs");
 const path = require("path");
 const glob = require("glob");
 const tape = require("tape");
+require("./tape-reporter");
 const markdownlint = require("../lib/markdownlint");
 const { utf8Encoding } = require("../helpers");
 

test/markdownlint-test.js

@@ -12,6 +12,7 @@ const pluginKatex = require("markdown-it-katex");
 const pluginSub = require("markdown-it-sub");
 const pluginSup = require("markdown-it-sup");
 const tape = require("tape");
+require("./tape-reporter");
 const tv4 = require("tv4");
 const packageJson = require("../package.json");
 const markdownlint = require("../lib/markdownlint");

test/tape-reporter.js

@@ -0,0 +1,47 @@
+// @ts-check
+
+"use strict";
+
+const tape = require("tape");
+const { EOL } = require("os");
+const { inspect } = require("util");
+const { stdout, stderr } = process;
+const inspectOptions = {
+  "compact": true,
+  "breakLength": Infinity
+};
+
+let tests = 0;
+let assertions = 0;
+let failures = 0;
+
+tape
+  .createStream({ "objectMode": true })
+  .on("data", (data) => {
+    if (data.type === "test") {
+      tests++;
+      stdout.write(`${data.name}${EOL}`);
+    } else if (data.id !== undefined) {
+      assertions++;
+      if (!data.ok) {
+        failures++;
+        stderr.write([
+          `  ${data.file}`,
+          `  Message:  ${data.name}`,
+          `  Operator: ${data.operator}`,
+          `  Expected: ${inspect(data.expected, inspectOptions)}`,
+          `  Actual:   ${inspect(data.actual, inspectOptions)}`,
+          ""
+        ].join(EOL));
+      }
+    }
+  })
+  .on("close", () => {
+    stdout.write([
+      "",
+      `Tests:    ${tests}`,
+      `Asserts:  ${assertions}`,
+      `Failures: ${failures}`,
+      ""
+    ].join(EOL));
+  });