From af71d55a49e1f45ceda4517f8ef8aa0c16d91bb3 Mon Sep 17 00:00:00 2001
From: Sheetal Nandi <shkamat@microsoft.com>
Date: Tue, 14 Aug 2018 16:10:32 -0700
Subject: [PATCH] Do not include json file unless --resolveJsonModule is
 specified Fixes #26402

---
 src/compiler/diagnosticMessages.json          |  6 ++++-
 src/compiler/program.ts                       |  6 ++++-
 ...ResolveJsonModuleAndPathMapping.errors.txt | 23 +++++++++++++++++++
 ...eWithoutResolveJsonModuleAndPathMapping.js |  2 --
 ...outResolveJsonModuleAndPathMapping.symbols |  4 ----
 ...thoutResolveJsonModuleAndPathMapping.types |  8 +------
 6 files changed, 34 insertions(+), 15 deletions(-)
 create mode 100644 tests/baselines/reference/requireOfJsonFileWithoutResolveJsonModuleAndPathMapping.errors.txt

diff --git a/src/compiler/diagnosticMessages.json b/src/compiler/diagnosticMessages.json
index 16b064f255c..6000c48de4d 100644
--- a/src/compiler/diagnosticMessages.json
+++ b/src/compiler/diagnosticMessages.json
@@ -3941,6 +3941,10 @@
         "category": "Error",
         "code": 7041
     },
+    "Module '{0}' was resolved to '{1}', but '--resolveJsonModule' is not used.": {
+        "category": "Error",
+        "code": 7042
+    },
     "You cannot rename this element.": {
         "category": "Error",
         "code": 8000
@@ -4576,4 +4580,4 @@
      "category": "Message",
          "code": 95066
     }
-}
\ No newline at end of file
+}
diff --git a/src/compiler/program.ts b/src/compiler/program.ts
index e2648907954..d52025f5a30 100644
--- a/src/compiler/program.ts
+++ b/src/compiler/program.ts
@@ -2849,7 +2849,6 @@ namespace ts {
         switch (extension) {
             case Extension.Ts:
             case Extension.Dts:
-            case Extension.Json: // Since module is resolved to json file only when --resolveJsonModule, we dont need further check
                 // These are always allowed.
                 return undefined;
             case Extension.Tsx:
@@ -2858,6 +2857,8 @@ namespace ts {
                 return needJsx() || needAllowJs();
             case Extension.Js:
                 return needAllowJs();
+            case Extension.Json:
+                return needResolveJsonModule();
         }
 
         function needJsx() {
@@ -2866,6 +2867,9 @@ namespace ts {
         function needAllowJs() {
             return options.allowJs || !getStrictOptionValue(options, "noImplicitAny") ? undefined : Diagnostics.Could_not_find_a_declaration_file_for_module_0_1_implicitly_has_an_any_type;
         }
+        function needResolveJsonModule() {
+            return options.resolveJsonModule ? undefined : Diagnostics.Module_0_was_resolved_to_1_but_resolveJsonModule_is_not_used;
+        }
     }
 
     function getModuleNames({ imports, moduleAugmentations }: SourceFile): string[] {
diff --git a/tests/baselines/reference/requireOfJsonFileWithoutResolveJsonModuleAndPathMapping.errors.txt b/tests/baselines/reference/requireOfJsonFileWithoutResolveJsonModuleAndPathMapping.errors.txt
new file mode 100644
index 00000000000..fee86f2174c
--- /dev/null
+++ b/tests/baselines/reference/requireOfJsonFileWithoutResolveJsonModuleAndPathMapping.errors.txt
@@ -0,0 +1,23 @@
+/a.ts(1,20): error TS7042: Module 'foo/bar/foobar.json' was resolved to '/node_modules/foo/bar/foobar.json', but '--resolveJsonModule' is not used.
+
+
+==== /tsconfig.json (0 errors) ====
+    {
+        "compilerOptions": {
+            "baseUrl": ".",
+            "paths": {
+                "*": ["node_modules/*", "src/types"]
+            },
+            "allowJs": true,
+            "outDir": "bin"
+        }
+    }
+    
+==== /a.ts (1 errors) ====
+    import foobar from "foo/bar/foobar.json";
+                       ~~~~~~~~~~~~~~~~~~~~~
+!!! error TS7042: Module 'foo/bar/foobar.json' was resolved to '/node_modules/foo/bar/foobar.json', but '--resolveJsonModule' is not used.
+    
+==== /node_modules/foo/bar/foobar.json (0 errors) ====
+    { "a": 10 }
+    
\ No newline at end of file
diff --git a/tests/baselines/reference/requireOfJsonFileWithoutResolveJsonModuleAndPathMapping.js b/tests/baselines/reference/requireOfJsonFileWithoutResolveJsonModuleAndPathMapping.js
index c7e1296deb2..bda2f7194d3 100644
--- a/tests/baselines/reference/requireOfJsonFileWithoutResolveJsonModuleAndPathMapping.js
+++ b/tests/baselines/reference/requireOfJsonFileWithoutResolveJsonModuleAndPathMapping.js
@@ -7,8 +7,6 @@
 import foobar from "foo/bar/foobar.json";
 
 
-//// [/bin/node_modules/foo/bar/foobar.json]
-{ "a": 10 }
 //// [/bin/a.js]
 "use strict";
 exports.__esModule = true;
diff --git a/tests/baselines/reference/requireOfJsonFileWithoutResolveJsonModuleAndPathMapping.symbols b/tests/baselines/reference/requireOfJsonFileWithoutResolveJsonModuleAndPathMapping.symbols
index b934b22d66a..9cc71ea6e59 100644
--- a/tests/baselines/reference/requireOfJsonFileWithoutResolveJsonModuleAndPathMapping.symbols
+++ b/tests/baselines/reference/requireOfJsonFileWithoutResolveJsonModuleAndPathMapping.symbols
@@ -2,7 +2,3 @@
 import foobar from "foo/bar/foobar.json";
 >foobar : Symbol(foobar, Decl(a.ts, 0, 6))
 
-=== /node_modules/foo/bar/foobar.json ===
-{ "a": 10 }
->"a" : Symbol("a", Decl(foobar.json, 0, 1))
-
diff --git a/tests/baselines/reference/requireOfJsonFileWithoutResolveJsonModuleAndPathMapping.types b/tests/baselines/reference/requireOfJsonFileWithoutResolveJsonModuleAndPathMapping.types
index 129433bbcd6..23981045b3c 100644
--- a/tests/baselines/reference/requireOfJsonFileWithoutResolveJsonModuleAndPathMapping.types
+++ b/tests/baselines/reference/requireOfJsonFileWithoutResolveJsonModuleAndPathMapping.types
@@ -1,10 +1,4 @@
 === /a.ts ===
 import foobar from "foo/bar/foobar.json";
->foobar : { "a": number; }
-
-=== /node_modules/foo/bar/foobar.json ===
-{ "a": 10 }
->{ "a": 10 } : { "a": number; }
->"a" : number
->10 : 10
+>foobar : any