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[dsch] adding the type-hidden properties error to Ok and value to Err… #6
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WalkthroughThe changes involve modifications to type assertions in result variables, the introduction of new getter methods in the Changes
Possibly related PRs
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Pull Request Test Coverage Report for Build 11054870290Details
💛 - Coveralls |
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Actionable comments posted: 2
🧹 Outside diff range comments (2)
src/Ok.ts (1)
Line range hint
1-93
: Consider standardizing error messages for consistencyThe new
error
getter introduces a specific error message: "Result is not an Err". For consistency, you might want to review and standardize error messages across the class. For instance, theunwrapErr
method on line 52 uses the same error message.Consider creating a constant for this error message to ensure consistency and ease of maintenance:
private static readonly NOT_ERR_MESSAGE = 'Result is not an Err'; // Then use it in both places: get error(): never { throw new TypeError(OkImpl.NOT_ERR_MESSAGE, { cause: this }); } unwrapErr(): never { throw new TypeError(OkImpl.NOT_ERR_MESSAGE, { cause: this }); }This change would improve maintainability and ensure consistent error messaging throughout the class.
examples/methods.ts (1)
Inconsistent Type Assertions Detected in
examples/methods.ts
Several instances of
ok()
anderr()
inexamples/methods.ts
lack type assertions related toResult
. To ensure consistency and enhance type safety, please apply appropriate type assertions or generic type parameters to allok()
anderr()
usages.
- Example without type assertion:
const okResult = ok(42); const errResult = err('ERR_NOT_FOUND' as const);- Example with type assertion:
const okResult = ok(42) as Result<number, 'NOT_FOUND'>; const errResult = err('ERR_NOT_FOUND') as Result<string, 'ERR_NOT_FOUND'>;🔗 Analysis chain
Line range hint
1-165
: Verify consistency of type assertions across examplesWhile the changes are isolated to lines 122-123, it's important to ensure consistency across all examples in this file. Please review the other instances of
ok()
anderr()
usage to determine if similar type assertions or generic type parameters should be applied for consistency and improved type safety.
Line range hint
1-165
: Verify consistency of type assertions across examplesThe previous script encountered an error recognizing the
typescript
file type. Please use the following updated script to search forok()
anderr()
usage, as well as type assertions related toResult
withinexamples/methods.ts
:🏁 Scripts executed
The following scripts were executed for the analysis:
Script:
#!/bin/bash # Description: Check for other instances of ok() and err() that might benefit from similar changes # Test: Search for ok() and err() usage echo "Instances of ok() and err():" rg --type typescript '(ok|err)\(' examples/methods.ts # Test: Search for type assertions related to Result echo "\nType assertions related to Result:" rg --type typescript 'as Result<' examples/methods.tsLength of output: 331
Script:
#!/bin/bash # Description: Check for other instances of ok() and err() that might benefit from similar changes # Test: Search for ok() and err() usage echo "Instances of ok() and err():" rg '(ok|err)\(' examples/methods.ts # Test: Search for type assertions related to Result echo "\nType assertions related to Result:" rg 'as Result<' examples/methods.tsLength of output: 1786
📜 Review details
Configuration used: CodeRabbit UI
Review profile: ASSERTIVE
📒 Files selected for processing (6)
- examples/methods.ts (1 hunks)
- package.json (1 hunks)
- src/Err.ts (1 hunks)
- src/Ok.ts (1 hunks)
- src/result.test.ts (1 hunks)
- tsup.config.js (2 hunks)
🔇 Additional comments (11)
tsup.config.js (2)
17-17
: Excellent enhancement to configuration flexibility!The addition of the
options
parameter to the mapping function and spreading it into the configuration object is a great improvement. This change allows for more granular control over each entry's configuration, making the setup more versatile and easier to customize on a per-entry basis.Also applies to: 31-31
27-27
: Enabling minification with Terser: Good for production, verify impact.Changing
minify
to'terser'
is a good optimization for production builds, as it will result in smaller output files. However, it's important to ensure this change doesn't introduce any unexpected behavior.Please verify the following:
- The minified output works as expected in all target environments.
- This change aligns with the project's performance goals and debugging requirements.
You can use the following script to compare the output sizes and check for any potential issues:
src/Err.ts (2)
Line range hint
1-119
: Summary of changes tosrc/Err.ts
The addition of the
value
getter to theErrImpl
class is a positive change that enhances type safety and consistency in the error handling of the library. It provides a clear and type-safe way to prevent access to a non-existentvalue
onErr
instances.Key points:
- The new getter aligns well with TypeScript best practices.
- It maintains consistency with other error-throwing methods in the class.
- The change doesn't affect existing methods or their implementations.
To ensure a smooth integration of this change:
- Consider improving the error message for clarity.
- Update the project documentation to reflect this new behavior.
- Verify that this change doesn't introduce unexpected errors in other parts of the codebase.
Overall, this is a well-implemented improvement to the
ErrImpl
class.
16-19
: Verify the impact of the newvalue
getter on the codebase.The addition of the
value
getter toErrImpl
is a good improvement for type safety. However, we should ensure that this change doesn't introduce unexpected errors in other parts of the codebase wherevalue
might be accessed on aResult
type without first checking if it'sOk
.Run the following script to check for potential issues:
If the script finds any matches, please review those occurrences to ensure they properly check for
isOk
before accessingvalue
.src/Ok.ts (1)
17-19
: Excellent addition of theerror
getter!The new
error
getter method is a valuable addition to theOkImpl
class. It enhances type safety and improves the developer experience by providing immediate, clear feedback when attempting to access theerror
property on anOk
result.Key benefits:
- Consistent with TypeScript's
never
type, indicating that this method should never return normally.- Provides a descriptive error message, aiding in debugging and preventing misuse.
- Likely creates symmetry with a similar
value
getter on theErr
type, resulting in a more consistent API.This change aligns well with TypeScript's type system and error handling best practices.
package.json (3)
34-45
: Summary of package.json changesThe changes in the
package.json
file are primarily focused on dependency management:
- Reordering of some dependencies for better organization.
- Addition of
terser
for improved minification capabilities.- Updates to
typescript
andtypescript-eslint
versions.These changes align with the PR objectives by potentially improving build output and keeping the project up-to-date with the latest TypeScript features and best practices. However, it's important to ensure that the TypeScript updates don't introduce any breaking changes to the existing codebase.
40-40
: New dependency added: terserThe addition of
terser
as a dev dependency is likely related to minification improvements mentioned in the AI summary. This is a positive change that can help reduce the size of the built package.Let's verify if
terser
is being used in the build process:✅ Verification successful
Verified:
terser
is correctly integrated into the build process.🏁 Scripts executed
The following scripts were executed for the analysis:
Script:
#!/bin/bash # Description: Check if terser is used in any configuration files # Test: Search for terser usage in configuration files rg --type json --type js 'terser' -A 5Length of output: 479
44-45
: Updated TypeScript-related dependenciesThe
typescript
andtypescript-eslint
dependencies have been updated to newer versions. This is generally good for keeping up with the latest features and bug fixes. However, it's important to ensure that these updates don't introduce any breaking changes.Let's verify if there are any TypeScript-related issues after the update:
src/result.test.ts (3)
124-134
: LGTM! Well-structured test suite forOk.value
.The test suite for
Ok.value
is well-implemented:
- It correctly tests the happy path by verifying the
value
property of anOk
result.- It also checks the error case by ensuring that accessing the
value
property of anErr
result throws the expectedTypeError
.These tests provide good coverage for the
value
property behavior.
136-146
: LGTM! Well-structured test suite forErr.error
.The test suite for
Err.error
is well-implemented:
- It correctly tests the happy path by verifying the
error
property of anErr
result.- It also checks the error case by ensuring that accessing the
error
property of anOk
result throws the expectedTypeError
.These tests provide good coverage for the
error
property behavior and maintain consistency with theOk.value
test suite structure.
124-146
: Great addition to the test suite!The new test suites for
Ok.value
andErr.error
are well-structured and provide comprehensive coverage for these properties. They test both the happy path and error cases, ensuring robust behavior of the Result class. These additions improve the overall quality and reliability of the codebase.
src/Err.ts
Outdated
get value(): never { | ||
throw new TypeError('Result is not an Ok', { cause: this }); | ||
} | ||
|
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🧹 Nitpick (assertive)
Approve the addition of the value
getter with suggestions for improvement.
The new value
getter is a good addition to the ErrImpl
class. It enhances type safety and provides a consistent way to handle attempts to access the value
property on an Err
instance. The implementation is correct and aligns well with TypeScript best practices.
However, consider the following suggestions for improvement:
-
The error message could be more specific to help developers understand why they can't access
value
on anErr
. For example:throw new TypeError('Cannot access `value` on an Err instance. Use `error` property instead.', { cause: this });
-
Ensure that this change is documented in the project's documentation or changelog to inform users of this new behavior.
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Choose a reason for hiding this comment
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Actionable comments posted: 1
📜 Review details
Configuration used: CodeRabbit UI
Review profile: ASSERTIVE
📒 Files selected for processing (3)
- src/Err.ts (1 hunks)
- src/Ok.ts (1 hunks)
- src/result.test.ts (1 hunks)
🔇 Additional comments (4)
src/Err.ts (1)
16-20
: 🧹 Nitpick (assertive)Approve the addition of the
value
getter with suggestions for improvement.The new
value
getter is a valuable addition to theErrImpl
class. It enhances type safety by explicitly throwing an error when attempting to accessvalue
on anErr
instance. The implementation is correct and aligns well with TypeScript best practices.However, consider the following suggestions for further improvement:
Make the error message more informative to help developers understand why they can't access
value
on anErr
. For example:throw new TypeError('Cannot access `value` on an Err instance. Use `error` property instead.', { cause: this });Ensure that this change is documented in the project's documentation or changelog to inform users of this new behavior.
src/result.test.ts (3)
124-136
: LGTM! Well-structured tests forOk.value
.The test suite for
Ok.value
is well-designed, covering both the successful case and the error case. It ensures that:
- The
value
property of anOk
result returns the correct value.- Accessing the
value
property of anErr
result throws aTypeError
with the appropriate message and cause.These tests effectively validate the behavior of the
value
property for bothOk
andErr
instances.
138-150
: LGTM! Well-structured tests forErr.error
.The test suite for
Err.error
is well-designed and symmetric to theOk.value
suite, which is excellent for consistency. It covers:
- The
error
property of anErr
result returns the correct error message.- Accessing the
error
property of anOk
result throws aTypeError
with the appropriate message and cause.These tests effectively validate the behavior of the
error
property for bothErr
andOk
instances.
124-150
: Excellent addition to the test suite!The new test suites for
Ok.value
andErr.error
are well-implemented and provide valuable coverage for theResult
class. They effectively test both the successful and error cases for accessing thevalue
anderror
properties onOk
andErr
instances. The symmetry between the two test suites enhances readability and maintainability. These additions will help ensure the robustness of theResult
class implementation.
… of type never
Summary by CodeRabbit
New Features
ErrImpl
andOkImpl
classes to handle error states more explicitly.terser
, for improved minification.Bug Fixes
value
anderror
properties inOk
andErr
results.Tests
value
anderror
properties for bothOk
andErr
results.Chores
package.json
for better organization.