test: Add test for DeepnoteRequirementsHelper

[tkislan]

Summary by CodeRabbit

• Tests
  • Added unit tests verifying generation of a requirements.txt when none exists: ensures the file is created at the expected path and contains the specified packages with exact version operators and formatting (each dependency on its own line, LF line endings, and a trailing newline).

[coderabbitai]

📝 Walkthrough

Walkthrough

Adds a unit test suite for DeepnoteRequirementsHelper.node that verifies createRequirementsFile writes a requirements.txt when none exists. The test mocks VSCode workspace context, fs.promises.access and fs.promises.writeFile, logging, and a cancellable token. It constructs a DeepnoteProject with dependencies (numpy>=1.20.0, pandas==1.3.0, matplotlib) and asserts the written path contains requirements.txt and the file content matches exact LF-separated lines with a trailing newline.

Sequence Diagram(s)

sequenceDiagram
    participant Test as Unit Test
    participant Helper as DeepnoteRequirementsHelper
    participant FS as fs.promises
    participant Assert as Assertions

    Note right of Test `#DDEBF7`: Setup mocks\n(workspace, token, logger)
    Test->>Helper: createRequirementsFile(project, token)
    Helper->>FS: access(path)  -- mocked to throw (file missing)
    alt file missing
        Helper->>FS: writeFile(path, content)  -- captured by mock
        FS-->>Helper: resolve
        Helper-->>Test: return success
    end
    Test->>Assert: verify path contains "requirements.txt"
    Test->>Assert: verify captured content:
    Note right of Assert `#F7F3D9`: "numpy>=1.20.0\npandas==1.3.0\nmatplotlib\n"
    Assert-->>Test: pass/fail

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✅ Passed checks (2 passed)

Check name	Status	Explanation
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Title check	✅ Passed	Title directly describes the main change: adding a unit test for DeepnoteRequirementsHelper.

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[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 73%. Comparing base (c80091e) to head (ee6c9b7).
⚠️ Report is 1 commits behind head on main.
✅ All tests successful. No failed tests found.

Additional details and impacted files

@@          Coverage Diff          @@
##            main    #178   +/-   ##
=====================================
  Coverage     73%     73%           
=====================================
  Files        574     575    +1     
  Lines      46881   46922   +41     
  Branches    5521    5521           
=====================================
+ Hits       34428   34488   +60     
+ Misses     10635   10612   -23     
- Partials    1818    1822    +4     

Files with missing lines	Coverage Δ
...pnote/deepnoteRequirementsHelper.node.unit.test.ts	100% <100%> (ø)

... and 1 file with indirect coverage changes

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Actionable comments posted: 2

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• src/notebooks/deepnote/deepnoteRequirementsHelper.node.unit.test.ts (1 hunks)

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**/*.{test,spec}.ts

📄 CodeRabbit inference engine (.github/instructions/typescript.instructions.md)

In unit tests, when a mock is returned from a promise, ensure the mocked instance has an undefined then property to avoid hanging tests

Files:

• src/notebooks/deepnote/deepnoteRequirementsHelper.node.unit.test.ts

🧬 Code graph analysis (1)

src/notebooks/deepnote/deepnoteRequirementsHelper.node.unit.test.ts (3)

src/test/mocks/vsc/index.ts (1)

• CancellationToken (100-112)

src/test/vscode-mock.ts (2)

• resetVSCodeMocks (60-79)
• mockedVSCodeNamespaces (17-17)

src/platform/deepnote/deepnoteTypes.ts (1)

• DeepnoteProject (12-12)

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• src/notebooks/deepnote/deepnoteRequirementsHelper.node.unit.test.ts (1 hunks)

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**/*.{test,spec}.ts

📄 CodeRabbit inference engine (.github/instructions/typescript.instructions.md)

In unit tests, when a mock is returned from a promise, ensure the mocked instance has an undefined then property to avoid hanging tests

Files:

• src/notebooks/deepnote/deepnoteRequirementsHelper.node.unit.test.ts

🧬 Code graph analysis (1)

src/notebooks/deepnote/deepnoteRequirementsHelper.node.unit.test.ts (3)

src/test/mocks/vsc/index.ts (1)

• CancellationToken (100-112)

src/test/vscode-mock.ts (2)

• resetVSCodeMocks (60-79)
• mockedVSCodeNamespaces (17-17)

src/platform/deepnote/deepnoteTypes.ts (1)

• DeepnoteProject (12-12)

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Actionable comments posted: 1

📜 Review details

Configuration used: CodeRabbit UI

Review profile: ASSERTIVE

Plan: Pro

Disabled knowledge base sources:

• Linear integration is disabled by default for public repositories

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📥 Commits

Reviewing files that changed from the base of the PR and between ecc5ec2 and 39061de.

📒 Files selected for processing (1)

• src/notebooks/deepnote/deepnoteRequirementsHelper.node.unit.test.ts (1 hunks)

🧰 Additional context used

📓 Path-based instructions (1)

**/*.{test,spec}.ts

📄 CodeRabbit inference engine (.github/instructions/typescript.instructions.md)

In unit tests, when a mock is returned from a promise, ensure the mocked instance has an undefined then property to avoid hanging tests

Files:

• src/notebooks/deepnote/deepnoteRequirementsHelper.node.unit.test.ts

🧬 Code graph analysis (1)

src/notebooks/deepnote/deepnoteRequirementsHelper.node.unit.test.ts (3)

src/test/mocks/vsc/index.ts (1)

• CancellationToken (100-112)

src/test/vscode-mock.ts (2)

• resetVSCodeMocks (60-79)
• mockedVSCodeNamespaces (17-17)

src/platform/deepnote/deepnoteTypes.ts (1)

• DeepnoteProject (12-12)

⏰ Context from checks skipped due to timeout of 90000ms. You can increase the timeout in your CodeRabbit configuration to a maximum of 15 minutes (900000ms). (1)

• GitHub Check: Build & Test

🔇 Additional comments (5)

src/notebooks/deepnote/deepnoteRequirementsHelper.node.unit.test.ts (5)

1-11: LGTM!

Imports are clean and appropriate for the test setup.

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13-19: LGTM!

Test suite structure is well-defined.

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20-34: LGTM!

Setup correctly initializes mocks and creates the helper instance. The CancellationToken mock does not need a then property per previous discussion.

Based on learnings

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36-39: LGTM!

Proper teardown prevents test pollution.

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69-70: Good improvement with ENOENT error code.

The test now uses a realistic filesystem error with the ENOENT code, improving test fidelity over the previous generic error.