Allow to pass the exact test filenames

packages/jest-cli/src/SearchSource.js

@@ -13,6 +13,7 @@ import type {Glob, Path} from 'types/Config';
 import type {ResolveModuleConfig} from 'types/Resolve';
 import type {Test} from 'types/TestRunner';
 
+import fs from 'fs';
 import path from 'path';
 import micromatch from 'micromatch';
 import DependencyResolver from 'jest-resolve-dependencies';
@@ -76,6 +77,15 @@ const toTests = (context, tests) =>
     path,
   }));
 
+const fileExists = (filePath: string) => {
+  try {
+    fs.accessSync(filePath, fs.F_OK);
+    return true;
+  } catch (e) {
+    return false;
+  }
+};
+
 class SearchSource {
   _context: Context;
   _options: ResolveModuleConfig;
@@ -230,12 +240,16 @@ class SearchSource {
       return Promise.resolve(
         this.findRelatedTestsFromPattern(testSelectionConfig.paths),
       );
-    } else if (testSelectionConfig.testPathPattern != null) {
-      return Promise.resolve(
-        this.findMatchingTests(testSelectionConfig.testPathPattern),
-      );
     } else {
-      return Promise.resolve({tests: []});
+      const validTestPaths = testSelectionConfig.paths && testSelectionConfig.paths.filter(fileExists);
+
+      if (validTestPaths && validTestPaths.length) {
+        return Promise.resolve({tests: toTests(this._context, validTestPaths)});
+      } else if (testSelectionConfig.testPathPattern != null) {
+        return Promise.resolve(this.findMatchingTests(testSelectionConfig.testPathPattern));
+      } else {
+        return Promise.resolve({tests: []});
+      }
     }
   }
 }