testing: reorganize tests

[arkjedrz]

• Remove redundant files.
• Reduce number of test files.
• Move common.rs to common/mod.rs as recommended by Rust Book.
• Uniform derive usage in kvs_api.rs.
• Bazel target for unit tests.

[github-actions]

License Check Results

🚀 The license check job ran with the Bazel command:

bazel run //:license-check

Status: ⚠️ Needs Review

Click to expand output

[License Check Output]
Extracting Bazel installation...
Starting local Bazel server and connecting to it...
INFO: Invocation ID: 08201df9-9f6f-414e-8119-186bfb7fdea6
Computing main repo mapping: 
Computing main repo mapping: 
DEBUG: Rule 'rules_boost~' indicated that a canonical reproducible form can be obtained by modifying arguments integrity = "sha256-aSViuHoOdF32Ue/Cx02/mOzyEebHMFuifjZs4GNWjsE="
DEBUG: Repository rules_boost~ instantiated at:
  <builtin>: in <toplevel>
Repository rule http_archive defined at:
  /home/runner/.bazel/external/bazel_tools/tools/build_defs/repo/http.bzl:387:31: in <toplevel>
Computing main repo mapping: 
WARNING: For repository 'googletest', the root module requires module version googletest@1.14.0, but got googletest@1.15.0 in the resolved dependency graph.
WARNING: For repository 'aspect_rules_lint', the root module requires module version aspect_rules_lint@1.0.3, but got aspect_rules_lint@1.4.2 in the resolved dependency graph.
Computing main repo mapping: 
Loading: 
Loading: 1 packages loaded
Analyzing: target //:license-check (2 packages loaded, 0 targets configured)
Analyzing: target //:license-check (2 packages loaded, 0 targets configured)

Analyzing: target //:license-check (72 packages loaded, 10 targets configured)

Analyzing: target //:license-check (106 packages loaded, 10 targets configured)

Analyzing: target //:license-check (158 packages loaded, 1495 targets configured)

Analyzing: target //:license-check (165 packages loaded, 2810 targets configured)

Analyzing: target //:license-check (165 packages loaded, 2810 targets configured)

Analyzing: target //:license-check (168 packages loaded, 4816 targets configured)

Analyzing: target //:license-check (170 packages loaded, 5060 targets configured)

Analyzing: target //:license-check (170 packages loaded, 5060 targets configured)

INFO: Analyzed target //:license-check (171 packages loaded, 6979 targets configured).
[9 / 13] [Prepa] JavaToolchainCompileClasses external/rules_java~/toolchains/platformclasspath_classes
ERROR: /home/runner/work/inc_mw_per/inc_mw_per/BUILD:36:21: Generating Dash formatted dependency file ... failed: missing input file '//:cargo_lock'
ERROR: /home/runner/work/inc_mw_per/inc_mw_per/BUILD:36:21: Generating Dash formatted dependency file ... failed: 1 input file(s) do not exist
Target //:license.check.license_check failed to build
Use --verbose_failures to see the command lines of failed build steps.
ERROR: /home/runner/work/inc_mw_per/inc_mw_per/BUILD:36:21 Generating Dash formatted dependency file ... failed: 1 input file(s) do not exist
INFO: Elapsed time: 184.427s, Critical Path: 0.31s
INFO: 10 processes: 1 disk cache hit, 9 internal.
ERROR: Build did NOT complete successfully
ERROR: Build failed. Not running target

[github-actions]

The created documentation from the pull request is available at: docu-html

[PiotrKorkus]

In general the concept of keeping unit tests together with implementation is the proffered way according to Rust documentation. There are different opinions on that in SCORE but as long as file doesn't look like 10% implementation, 90% tests I think it is a good move.

[PiotrKorkus]

Looks good to me, let's wait for final decision from Vinod