diff --git a/static_src/shared/converters.test.js b/static_src/shared/converters.test.js
new file mode 100644
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+++ b/static_src/shared/converters.test.js
@@ -0,0 +1,112 @@
+// Copyright 2020 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+import {assert} from 'chai';
+import {ResourceNameError, pathsToFieldMask, extractUserId,
+  extractProjectDisplayName, extractProjectFromProjectMember,
+  projectAndUserToStarName, projectMemberToProjectName} from './converters.js';
+
+describe('pathsToFieldMask', () => {
+  it('converts an array of strings to a FieldMask', () => {
+    assert.equal(pathsToFieldMask(['foo', 'barQux', 'qaz']), 'foo,barQux,qaz');
+  });
+});
+
+describe('extractUserId', () => {
+  it('throws error on improperly formatted resource name', () => {
+    assert.throws(() => extractUserId('projects/1234'),
+        ResourceNameError);
+    assert.throws(() => extractUserId('users/notAnId'),
+        ResourceNameError);
+    assert.throws(() => extractUserId('user/1234'),
+        ResourceNameError);
+  });
+
+  it('extracts user ID', () => {
+    assert.equal(extractUserId('users/1234'), '1234');
+  });
+});
+
+describe('extractProjectDisplayName', () => {
+  it('throws error on improperly formatted resource name', () => {
+    assert.throws(() => extractProjectDisplayName('users/1234'),
+        ResourceNameError);
+    assert.throws(() => extractProjectDisplayName('projects/(what)'),
+        ResourceNameError);
+    assert.throws(() => extractProjectDisplayName('project/test'),
+        ResourceNameError);
+    assert.throws(() => extractProjectDisplayName('projects/-test-'),
+        ResourceNameError);
+  });
+
+  it('extracts project display name', () => {
+    assert.equal(extractProjectDisplayName('projects/1234'), '1234');
+    assert.equal(extractProjectDisplayName('projects/monorail'), 'monorail');
+    assert.equal(extractProjectDisplayName('projects/test-project'),
+        'test-project');
+    assert.equal(extractProjectDisplayName('projects/what-is-love2'),
+        'what-is-love2');
+  });
+});
+
+describe('extractProjectFromProjectMember', () => {
+  it('throws error on improperly formatted resource name', () => {
+    assert.throws(
+        () => extractProjectFromProjectMember(
+            'projects/monorail/members/fakeName'),
+        ResourceNameError);
+    assert.throws(
+        () => extractProjectFromProjectMember(
+            'projects/-invalid-project-/members/1234'),
+        ResourceNameError);
+    assert.throws(
+        () => extractProjectFromProjectMember(
+            'projects/monorail/member/1234'),
+        ResourceNameError);
+  });
+
+  it('extracts project display name', () => {
+    assert.equal(extractProjectFromProjectMember(
+        'projects/1234/members/1234'), '1234');
+    assert.equal(extractProjectFromProjectMember(
+        'projects/monorail/members/1234'), 'monorail');
+    assert.equal(extractProjectFromProjectMember(
+        'projects/test-project/members/1234'), 'test-project');
+    assert.equal(extractProjectFromProjectMember(
+        'projects/what-is-love2/members/1234'), 'what-is-love2');
+  });
+});
+
+describe('projectAndUserToStarName', () => {
+  it('throws error on improperly formatted resource name', () => {
+    assert.throws(
+        () => projectAndUserToStarName('users/1234', 'projects/monorail'),
+        ResourceNameError);
+  });
+
+  it('generates project star resource name', () => {
+    assert.equal(projectAndUserToStarName('projects/monorail', 'users/1234'),
+        'users/1234/projectStars/monorail');
+  });
+});
+
+describe('projectMemberToProjectName', () => {
+  it('throws error on improperly formatted resource name', () => {
+    assert.throws(
+        () => projectMemberToProjectName(
+            'projects/monorail/members/fakeName'),
+        ResourceNameError);
+  });
+
+  it('creates project resource name', () => {
+    assert.equal(projectMemberToProjectName(
+        'projects/1234/members/1234'), 'projects/1234');
+    assert.equal(projectMemberToProjectName(
+        'projects/monorail/members/1234'), 'projects/monorail');
+    assert.equal(projectMemberToProjectName(
+        'projects/test-project/members/1234'), 'projects/test-project');
+    assert.equal(projectMemberToProjectName(
+        'projects/what-is-love2/members/1234'), 'projects/what-is-love2');
+  });
+});