Postman Cheat Sheet - Martkos IT

Keyboard Shortcuts

Ctrl/Cmd + EnterSend request
Ctrl/Cmd + SSave request
Ctrl/Cmd + NNew tab
Ctrl/Cmd + WClose tab
Ctrl/Cmd + /Toggle sidebar
Ctrl/Cmd + BToggle sidebar

Variable Syntax

{{variable}}Use variable
{{$guid}}Random UUID
{{$timestamp}}Unix timestamp
{{$randomInt}}Random integer
{{$randomEmail}}Random email

Variable Scopes

GlobalAll workspaces
CollectionWithin collection
EnvironmentPer environment
DataFrom data file
LocalSingle request

pm Object

pm.responseResponse object
pm.requestRequest object
pm.environmentEnvironment vars
pm.globalsGlobal vars
pm.collectionVariablesCollection vars

Pre-request Script Examples

// Set variable
pm.environment.set("token", "abc123");

// Get variable
const baseUrl = pm.environment.get("baseUrl");

// Generate timestamp
pm.environment.set("timestamp", Date.now());

// Generate random number
pm.environment.set("randomId", Math.floor(Math.random() * 1000));
          

Test Script Examples

// Status code check
pm.test("Status code is 200", function() {
    pm.response.to.have.status(200);
});

// Response time check
pm.test("Response time < 500ms", function() {
    pm.expect(pm.response.responseTime).to.be.below(500);
});

// JSON body check
pm.test("Has user id", function() {
    const jsonData = pm.response.json();
    pm.expect(jsonData.id).to.exist;
});
          

Chai Assertions

pm.expect(x).to.equal(y)Equality
pm.expect(x).to.be.trueBoolean check
pm.expect(x).to.existExists check
pm.expect(x).to.include(y)Contains
pm.expect(x).to.be.an("array")Type check

Response Checks

pm.response.json()Parse JSON
pm.response.text()Get text
pm.response.codeStatus code
pm.response.responseTimeResponse time
pm.response.headersHeaders object

Newman CLI Commands

# Run collection
newman run collection.json

# With environment
newman run collection.json -e environment.json

# With data file (CSV/JSON)
newman run collection.json -d data.csv

# Generate HTML report
newman run collection.json -r htmlextra

# Run specific folder
newman run collection.json --folder "API Tests"

# Set iterations
newman run collection.json -n 10
          

Dynamic Variables

{{$randomFirstName}}Random name
{{$randomLastName}}Random surname
{{$randomCity}}Random city
{{$randomPhoneNumber}}Random phone
{{$randomLoremWord}}Lorem word

Collection Runner

IterationsRun multiple times
DelayBetween requests
Data fileCSV/JSON input
Keep variablesPersist values