feat: Add "--json" flag to deno lint (#6940)

Co-authored-by: JackSkylark <jdslaughter44@gmail.com>

4 files changed, 57 insertions, 3 deletions

diff --git a/cli/tests/integration_tests.rs b/cli/tests/integration_tests.rs
index bb7ba0d6f..6e487d12f 100644
--- a/cli/tests/integration_tests.rs
+++ b/cli/tests/integration_tests.rs
@@ -2216,14 +2216,21 @@ itest!(deno_lint {
   exit_code: 1,
 });
 
+itest!(deno_lint_json {
+  args:
+    "lint --unstable --json lint/file1.js lint/file2.ts lint/ignored_file.ts lint/malformed.js",
+  output: "lint/expected_json.out",
+  exit_code: 1,
+});
+
 itest!(deno_lint_ignore {
-  args: "lint --unstable --ignore=lint/file1.js lint/",
+  args: "lint --unstable --ignore=lint/file1.js,lint/malformed.js lint/",
   output: "lint/expected_ignore.out",
   exit_code: 1,
 });
 
 itest!(deno_lint_glob {
-  args: "lint --unstable lint/",
+  args: "lint --unstable --ignore=lint/malformed.js lint/",
   output: "lint/expected_glob.out",
   exit_code: 1,
 });
diff --git a/cli/tests/lint/expected_ignore.out b/cli/tests/lint/expected_ignore.out
index 6041d1c6a..02b9d917c 100644
--- a/cli/tests/lint/expected_ignore.out
+++ b/cli/tests/lint/expected_ignore.out
@@ -1,2 +1,2 @@
 [WILDCARD]
-Found 1 problems
+Found 1 problem
diff --git a/cli/tests/lint/expected_json.out b/cli/tests/lint/expected_json.out
new file mode 100644
index 000000000..b4ce63395
--- /dev/null
+++ b/cli/tests/lint/expected_json.out
@@ -0,0 +1,43 @@
+{
+  "diagnostics": [
+    {
+      "location": {
+        "filename": "[WILDCARD]",
+        "line": 1,
+        "col": 0
+      },
+      "message": "Ignore directive requires lint rule code",
+      "code": "ban-untagged-ignore",
+      "line_src": "// deno-lint-ignore",
+      "snippet_length": 19
+    },
+    {
+      "location": {
+        "filename": "[WILDCARD]",
+        "line": 2,
+        "col": 14
+      },
+      "message": "Empty block statement",
+      "code": "no-empty",
+      "line_src": "while (false) {}",
+      "snippet_length": 2
+    },
+    {
+      "location": {
+        "filename": "[WILDCARD]",
+        "line": 3,
+        "col": 12
+      },
+      "message": "Empty block statement",
+      "code": "no-empty",
+      "line_src": "} catch (e) {}",
+      "snippet_length": 2
+    }
+  ],
+  "errors": [
+    {
+      "file_path": "[WILDCARD]malformed.js",
+      "message": "Expected RBrace, got None at [WILDCARD]malformed.js:4:15"
+    }
+  ]
+}
diff --git a/cli/tests/lint/malformed.js b/cli/tests/lint/malformed.js
new file mode 100644
index 000000000..5ad4650d6
--- /dev/null
+++ b/cli/tests/lint/malformed.js
@@ -0,0 +1,4 @@
+// deno-fmt-ignore-file
+
+// intentionally malformed file
+export class A {
\ No newline at end of file