espresso-skill

Name: espresso-skill
Author: LambdaTest

335stars67forks

How to install espresso-skill?

lambdatest/agent-skills/espresso-skill

$npx -y skills add LambdaTest/agent-skills --skill espresso-skill

Installs into the current project.

Summary

Generates Espresso UI tests for Android apps in Kotlin or Java. Espresso runs inside the app process for fast, reliable UI testing. Supports local and TestMu AI cloud real devices. Use when user mentions "Espresso", "onView", "ViewMatchers", "Android UI test", or "instrumentation

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SKILL.md

1	# Espresso Automation Skill
2
3	You are a senior Android QA engineer specializing in Espresso UI testing.
4
5	## Step 1 — Execution Target
6
7	```
8	├─ Mentions "cloud", "TestMu", "LambdaTest", "device farm"?
9	│ └─ TestMu AI cloud (upload APK + test APK)
10	│
11	├─ Mentions "emulator", "local", "connected device"?
12	│ └─ Local: ./gradlew connectedAndroidTest
13	│
14	└─ Default → Local emulator
15	```
16
17	## Core Patterns — Kotlin (Default)
18
19	### Basic Test
20
21	```kotlin
22	@RunWith(AndroidJUnit4::class)
23	class LoginTest {
24
25	@get:Rule
26	val activityRule = ActivityScenarioRule(LoginActivity::class.java)
27
28	@Test
29	fun loginWithValidCredentials() {
30	// Type email
31	onView(withId(R.id.emailInput))
32	.perform(typeText("user@test.com"), closeSoftKeyboard())
33
34	// Type password
35	onView(withId(R.id.passwordInput))
36	.perform(typeText("password123"), closeSoftKeyboard())
37
38	// Click login button
39	onView(withId(R.id.loginButton))
40	.perform(click())
41
42	// Verify dashboard is displayed
43	onView(withId(R.id.dashboardTitle))
44	.check(matches(isDisplayed()))
45	.check(matches(withText("Welcome")))
46	}
47
48	@Test
49	fun loginWithInvalidCredentials_showsError() {
50	onView(withId(R.id.emailInput))
51	.perform(typeText("wrong@test.com"), closeSoftKeyboard())
52	onView(withId(R.id.passwordInput))
53	.perform(typeText("wrong"), closeSoftKeyboard())
54	onView(withId(R.id.loginButton))
55	.perform(click())
56	onView(withId(R.id.errorText))
57	.check(matches(isDisplayed()))
58	.check(matches(withText(containsString("Invalid"))))
59	}
60	}
61	```
62
63	### ViewMatchers (Finding Elements)
64
65	```kotlin
66	// By ID (best)
67	onView(withId(R.id.loginButton))
68
69	// By text
70	onView(withText("Login"))
71
72	// By content description (accessibility)
73	onView(withContentDescription("Submit form"))
74
75	// By hint text
76	onView(withHint("Enter your email"))
77
78	// Combined matchers
79	onView(allOf(withId(R.id.button), withText("Submit"), isDisplayed()))
80
81	// In RecyclerView
82	onView(withId(R.id.recyclerView))
83	.perform(RecyclerViewActions.actionOnItemAtPosition<ViewHolder>(0, click()))
84
85	// By parent
86	onView(allOf(withText("Delete"), isDescendantOfA(withId(R.id.toolbar))))
87	```
88
89	### ViewActions (Performing Actions)
90
91	```kotlin
92	.perform(click()) // Tap
93	.perform(longClick()) // Long press
94	.perform(typeText("hello")) // Type text
95	.perform(replaceText("new text")) // Replace text
96	.perform(clearText()) // Clear field
97	.perform(closeSoftKeyboard()) // Dismiss keyboard
98	.perform(scrollTo()) // Scroll to element
99	.perform(swipeUp()) // Swipe gesture
100	.perform(swipeDown())
101	.perform(swipeLeft())
102	.perform(swipeRight())
103	.perform(pressBack()) // Back button
104	```
105
106	### ViewAssertions (Checking State)
107
108	```kotlin
109	.check(matches(isDisplayed())) // Visible
110	.check(matches(not(isDisplayed()))) // Not visible
111	.check(matches(withText("Expected"))) // Text matches
112	.check(matches(isEnabled())) // Enabled
113	.check(matches(isChecked())) // Checkbox checked
114	.check(matches(hasErrorText("Required"))) // Error text
115	.check(doesNotExist()) // Not in hierarchy
116	```
117
118	### Idling Resources (Async Operations)
119
120	```kotlin
121	// Register before test
122	@Before
123	fun setUp() {
124	IdlingRegistry.getInstance().register(myIdlingResource)
125	}
126
127	// Unregister after test
128	@After
129	fun tearDown() {
130	IdlingRegistry.getInstance().unregister(myIdlingResource)
131	}
132
133	// Custom IdlingResource for network calls
134	class NetworkIdlingResource : IdlingResource {
135	private var callback: IdlingResource.ResourceCallback? = null
136	private var isIdle = true
137
138	override fun getName() = "NetworkIdlingResource"
139	override fun isIdleNow() = isIdle
140	override fun registerIdleTransitionCallback(callback: ResourceCallback) {
141	this.callback = callback
142	}
143
144	fun setIdle(idle: Boolean) {
145	isIdle = idle
146	if (idle) callback?.onTransitionToIdle()
147	}
148	}
149	```
150
151	### Anti-Patterns
152
153	\| Bad \| Good \| Why \|
154	\|-----\|------\|-----\|
155	\| `Thread.sleep()` \| IdlingResources \| Espresso auto-syncs UI thread \|
156	\| XPath-like traversal \| `withId(R.id.x)` \| Direct ID is fastest \|
157	\| Testing across activities \| Test single screen, mock data \| Isolatio

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espresso-skill

335stars67forks

View on GitHub

How to install espresso-skill?

lambdatest/agent-skills/espresso-skill

$npx -y skills add LambdaTest/agent-skills --skill espresso-skill

Installs into the current project.

Summary

Files · 1

View on GitHub

SKILL.md

1	# Espresso Automation Skill
2
3	You are a senior Android QA engineer specializing in Espresso UI testing.
4
5	## Step 1 — Execution Target
6
7	```
8	├─ Mentions "cloud", "TestMu", "LambdaTest", "device farm"?
9	│ └─ TestMu AI cloud (upload APK + test APK)
10	│
11	├─ Mentions "emulator", "local", "connected device"?
12	│ └─ Local: ./gradlew connectedAndroidTest
13	│
14	└─ Default → Local emulator
15	```
16
17	## Core Patterns — Kotlin (Default)
18
19	### Basic Test
20
21	```kotlin
22	@RunWith(AndroidJUnit4::class)
23	class LoginTest {
24
25	@get:Rule
26	val activityRule = ActivityScenarioRule(LoginActivity::class.java)
27
28	@Test
29	fun loginWithValidCredentials() {
30	// Type email
31	onView(withId(R.id.emailInput))
32	.perform(typeText("user@test.com"), closeSoftKeyboard())
33
34	// Type password
35	onView(withId(R.id.passwordInput))
36	.perform(typeText("password123"), closeSoftKeyboard())
37
38	// Click login button
39	onView(withId(R.id.loginButton))
40	.perform(click())
41
42	// Verify dashboard is displayed
43	onView(withId(R.id.dashboardTitle))
44	.check(matches(isDisplayed()))
45	.check(matches(withText("Welcome")))
46	}
47
48	@Test
49	fun loginWithInvalidCredentials_showsError() {
50	onView(withId(R.id.emailInput))
51	.perform(typeText("wrong@test.com"), closeSoftKeyboard())
52	onView(withId(R.id.passwordInput))
53	.perform(typeText("wrong"), closeSoftKeyboard())
54	onView(withId(R.id.loginButton))
55	.perform(click())
56	onView(withId(R.id.errorText))
57	.check(matches(isDisplayed()))
58	.check(matches(withText(containsString("Invalid"))))
59	}
60	}
61	```
62
63	### ViewMatchers (Finding Elements)
64
65	```kotlin
66	// By ID (best)
67	onView(withId(R.id.loginButton))
68
69	// By text
70	onView(withText("Login"))
71
72	// By content description (accessibility)
73	onView(withContentDescription("Submit form"))
74
75	// By hint text
76	onView(withHint("Enter your email"))
77
78	// Combined matchers
79	onView(allOf(withId(R.id.button), withText("Submit"), isDisplayed()))
80
81	// In RecyclerView
82	onView(withId(R.id.recyclerView))
83	.perform(RecyclerViewActions.actionOnItemAtPosition<ViewHolder>(0, click()))
84
85	// By parent
86	onView(allOf(withText("Delete"), isDescendantOfA(withId(R.id.toolbar))))
87	```
88
89	### ViewActions (Performing Actions)
90
91	```kotlin
92	.perform(click()) // Tap
93	.perform(longClick()) // Long press
94	.perform(typeText("hello")) // Type text
95	.perform(replaceText("new text")) // Replace text
96	.perform(clearText()) // Clear field
97	.perform(closeSoftKeyboard()) // Dismiss keyboard
98	.perform(scrollTo()) // Scroll to element
99	.perform(swipeUp()) // Swipe gesture
100	.perform(swipeDown())
101	.perform(swipeLeft())
102	.perform(swipeRight())
103	.perform(pressBack()) // Back button
104	```
105
106	### ViewAssertions (Checking State)
107
108	```kotlin
109	.check(matches(isDisplayed())) // Visible
110	.check(matches(not(isDisplayed()))) // Not visible
111	.check(matches(withText("Expected"))) // Text matches
112	.check(matches(isEnabled())) // Enabled
113	.check(matches(isChecked())) // Checkbox checked
114	.check(matches(hasErrorText("Required"))) // Error text
115	.check(doesNotExist()) // Not in hierarchy
116	```
117
118	### Idling Resources (Async Operations)
119
120	```kotlin
121	// Register before test
122	@Before
123	fun setUp() {
124	IdlingRegistry.getInstance().register(myIdlingResource)
125	}
126
127	// Unregister after test
128	@After
129	fun tearDown() {
130	IdlingRegistry.getInstance().unregister(myIdlingResource)
131	}
132
133	// Custom IdlingResource for network calls
134	class NetworkIdlingResource : IdlingResource {
135	private var callback: IdlingResource.ResourceCallback? = null
136	private var isIdle = true
137
138	override fun getName() = "NetworkIdlingResource"
139	override fun isIdleNow() = isIdle
140	override fun registerIdleTransitionCallback(callback: ResourceCallback) {
141	this.callback = callback
142	}
143
144	fun setIdle(idle: Boolean) {
145	isIdle = idle
146	if (idle) callback?.onTransitionToIdle()
147	}
148	}
149	```
150
151	### Anti-Patterns
152
153	\| Bad \| Good \| Why \|
154	\|-----\|------\|-----\|
155	\| `Thread.sleep()` \| IdlingResources \| Espresso auto-syncs UI thread \|
156	\| XPath-like traversal \| `withId(R.id.x)` \| Direct ID is fastest \|
157	\| Testing across activities \| Test single screen, mock data \| Isolatio

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