postman-testcase-generator

Name: postman-testcase-generator
Author: LambdaTest

335stars67forks

How to install postman-testcase-generator?

lambdatest/agent-skills/postman-testcase-generator

$npx -y skills add LambdaTest/agent-skills --skill postman-testcase-generator

Installs into the current project.

Summary

Write Postman test scripts (JavaScript) for pre-request logic and post-response assertions, and embed them directly into a Postman collection. Use this skill whenever the user wants to add tests to Postman requests, asks about "pm.test", "pm.expect", "Postman assertions", "test s

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SKILL.md

1	# Postman Test Script Writer
2
3	Writes and embeds Postman JavaScript test scripts — both `prerequest` and `test` scripts —
4	into collection requests. Works from an existing collection JSON or a plain description.
5
6	---
7
8	## Postman Scripting Basics
9
10	Postman scripts use the `pm` object and run in a sandboxed JS environment (no Node.js builtins).
11
12	### Key APIs
13
14	```javascript
15	// --- Assertions ---
16	pm.test("description", () => { pm.expect(...).to... });
17
18	// --- Response access ---
19	pm.response.code // HTTP status code (number)
20	pm.response.json() // Parse body as JSON
21	pm.response.text() // Body as string
22	pm.response.headers.get("Content-Type")
23	pm.response.responseTime // ms (number)
24
25	// --- Variables ---
26	pm.environment.set("key", value);
27	pm.environment.get("key");
28	pm.collectionVariables.set("key", value);
29	pm.collectionVariables.get("key");
30	pm.variables.get("key"); // resolves: local > data > env > collection > global
31
32	// --- Pre-request ---
33	pm.request.headers.add({ key: "X-Header", value: "val" });
34	```
35
36	---
37
38	## Step 1 — Understand What to Test
39
40	Identify the user's intent across these categories:
41
42	\| Category \| Examples \|
43	\|---\|---\|
44	\| Status assertion \| "should return 200", "expect 201 on create" \|
45	\| Schema/field check \| "response must have `id` and `name`", "check nested field" \|
46	\| Value assertion \| "user.email equals input", "count > 0" \|
47	\| Response time \| "must respond under 500ms" \|
48	\| Chaining \| "save token from login response for next request" \|
49	\| Dynamic pre-request \| "generate timestamp before request", "set random ID" \|
50	\| Error handling \| "if 401, log warning", "check error message format" \|
51
52	---
53
54	## Step 2 — Write the Scripts
55
56	### Status Code
57	```javascript
58	pm.test("Status is 200", () => {
59	pm.response.to.have.status(200);
60	});
61	```
62
63	### JSON Field Existence
64	```javascript
65	pm.test("Response has required fields", () => {
66	const body = pm.response.json();
67	pm.expect(body).to.have.property("id");
68	pm.expect(body).to.have.property("name");
69	});
70	```
71
72	### Field Type & Value
73	```javascript
74	pm.test("ID is a positive number", () => {
75	const body = pm.response.json();
76	pm.expect(body.id).to.be.a("number").and.to.be.above(0);
77	});
78	```
79
80	### Array Response
81	```javascript
82	pm.test("Returns a non-empty array", () => {
83	const body = pm.response.json();
84	pm.expect(body).to.be.an("array").with.length.above(0);
85	});
86	```
87
88	### Response Time
89	```javascript
90	pm.test("Response time under 500ms", () => {
91	pm.expect(pm.response.responseTime).to.be.below(500);
92	});
93	```
94
95	### Chaining — Save token after login
96	```javascript
97	// In Tests tab of login request:
98	pm.test("Login successful", () => {
99	pm.response.to.have.status(200);
100	const { access_token } = pm.response.json();
101	pm.environment.set("token", access_token);
102	});
103	```
104
105	### Pre-request — Dynamic value
106	```javascript
107	// In Pre-request Script tab:
108	pm.collectionVariables.set("timestamp", Date.now());
109	pm.collectionVariables.set("random_id", Math.floor(Math.random() * 10000));
110	```
111
112	### Schema Validation (using Ajv-style via tv4)
113	```javascript
114	const schema = {
115	type: "object",
116	required: ["id", "email"],
117	properties: {
118	id: { type: "number" },
119	email: { type: "string" }
120	}
121	};
122	pm.test("Response matches schema", () => {
123	const body = pm.response.json();
124	pm.expect(tv4.validate(body, schema)).to.be.true;
125	});
126	```
127
128	---
129
130	## Step 3 — Embed Into Collection JSON
131
132	When the user provides a collection, add scripts to the relevant request items:
133
134	```json
135	{
136	"name": "Login",
137	"event": [
138	{
139	"listen": "prerequest",
140	"script": {
141	"type": "text/javascript",
142	"exec": [ "// pre-request script lines as array of strings" ]
143	}
144	},
145	{
146	"listen": "test",
147	"script": {
148	"type": "text/javascript",
149	"exec": [
150	"pm.test(\"Status is 200\", () => {",
151	" pm.response.to.have.status(200);",
152	"});",
153	"",
154	"const { access_token } = pm.response.json();",
155	"pm.environment.set(\"token\", access_token);"
156	]
157	}
158	}
159	],
160	"req

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postman-testcase-generator

335stars67forks

View on GitHub

How to install postman-testcase-generator?

lambdatest/agent-skills/postman-testcase-generator

$npx -y skills add LambdaTest/agent-skills --skill postman-testcase-generator

Installs into the current project.

Summary

Files · 1

View on GitHub

SKILL.md

1	# Postman Test Script Writer
2
3	Writes and embeds Postman JavaScript test scripts — both `prerequest` and `test` scripts —
4	into collection requests. Works from an existing collection JSON or a plain description.
5
6	---
7
8	## Postman Scripting Basics
9
10	Postman scripts use the `pm` object and run in a sandboxed JS environment (no Node.js builtins).
11
12	### Key APIs
13
14	```javascript
15	// --- Assertions ---
16	pm.test("description", () => { pm.expect(...).to... });
17
18	// --- Response access ---
19	pm.response.code // HTTP status code (number)
20	pm.response.json() // Parse body as JSON
21	pm.response.text() // Body as string
22	pm.response.headers.get("Content-Type")
23	pm.response.responseTime // ms (number)
24
25	// --- Variables ---
26	pm.environment.set("key", value);
27	pm.environment.get("key");
28	pm.collectionVariables.set("key", value);
29	pm.collectionVariables.get("key");
30	pm.variables.get("key"); // resolves: local > data > env > collection > global
31
32	// --- Pre-request ---
33	pm.request.headers.add({ key: "X-Header", value: "val" });
34	```
35
36	---
37
38	## Step 1 — Understand What to Test
39
40	Identify the user's intent across these categories:
41
42	\| Category \| Examples \|
43	\|---\|---\|
44	\| Status assertion \| "should return 200", "expect 201 on create" \|
45	\| Schema/field check \| "response must have `id` and `name`", "check nested field" \|
46	\| Value assertion \| "user.email equals input", "count > 0" \|
47	\| Response time \| "must respond under 500ms" \|
48	\| Chaining \| "save token from login response for next request" \|
49	\| Dynamic pre-request \| "generate timestamp before request", "set random ID" \|
50	\| Error handling \| "if 401, log warning", "check error message format" \|
51
52	---
53
54	## Step 2 — Write the Scripts
55
56	### Status Code
57	```javascript
58	pm.test("Status is 200", () => {
59	pm.response.to.have.status(200);
60	});
61	```
62
63	### JSON Field Existence
64	```javascript
65	pm.test("Response has required fields", () => {
66	const body = pm.response.json();
67	pm.expect(body).to.have.property("id");
68	pm.expect(body).to.have.property("name");
69	});
70	```
71
72	### Field Type & Value
73	```javascript
74	pm.test("ID is a positive number", () => {
75	const body = pm.response.json();
76	pm.expect(body.id).to.be.a("number").and.to.be.above(0);
77	});
78	```
79
80	### Array Response
81	```javascript
82	pm.test("Returns a non-empty array", () => {
83	const body = pm.response.json();
84	pm.expect(body).to.be.an("array").with.length.above(0);
85	});
86	```
87
88	### Response Time
89	```javascript
90	pm.test("Response time under 500ms", () => {
91	pm.expect(pm.response.responseTime).to.be.below(500);
92	});
93	```
94
95	### Chaining — Save token after login
96	```javascript
97	// In Tests tab of login request:
98	pm.test("Login successful", () => {
99	pm.response.to.have.status(200);
100	const { access_token } = pm.response.json();
101	pm.environment.set("token", access_token);
102	});
103	```
104
105	### Pre-request — Dynamic value
106	```javascript
107	// In Pre-request Script tab:
108	pm.collectionVariables.set("timestamp", Date.now());
109	pm.collectionVariables.set("random_id", Math.floor(Math.random() * 10000));
110	```
111
112	### Schema Validation (using Ajv-style via tv4)
113	```javascript
114	const schema = {
115	type: "object",
116	required: ["id", "email"],
117	properties: {
118	id: { type: "number" },
119	email: { type: "string" }
120	}
121	};
122	pm.test("Response matches schema", () => {
123	const body = pm.response.json();
124	pm.expect(tv4.validate(body, schema)).to.be.true;
125	});
126	```
127
128	---
129
130	## Step 3 — Embed Into Collection JSON
131
132	When the user provides a collection, add scripts to the relevant request items:
133
134	```json
135	{
136	"name": "Login",
137	"event": [
138	{
139	"listen": "prerequest",
140	"script": {
141	"type": "text/javascript",
142	"exec": [ "// pre-request script lines as array of strings" ]
143	}
144	},
145	{
146	"listen": "test",
147	"script": {
148	"type": "text/javascript",
149	"exec": [
150	"pm.test(\"Status is 200\", () => {",
151	" pm.response.to.have.status(200);",
152	"});",
153	"",
154	"const { access_token } = pm.response.json();",
155	"pm.environment.set(\"token\", access_token);"
156	]
157	}
158	}
159	],
160	"req

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