Use OIDC for Codecov on GitHub Actions (#120)

The Codecov Action supports OIDC for authentication in place of
repository- or organization-level secrets when uploading coverage
information. (Tokenless upload is also an option but requires some
different configuration.) This commit updates the version of the Codecov
Action as well.

Reenable `fma` test on Windows to improve coverage, otherwise the
entire `fma_emulated` implementation is not covered.

While we're at it, add a Codecov badge to the README.

Author: ararslan

.github/workflows/CI.yml

@@ -5,6 +5,8 @@ on:
     branches:
       - master
     tags: '*'
+permissions:
+  id-token: write
 jobs:
   test:
     name: Julia ${{ matrix.version }} - ${{ matrix.os }} - ${{ matrix.arch }} - ${{ github.event_name }}
@@ -38,6 +40,7 @@ jobs:
       - uses: julia-actions/julia-buildpkg@v1
       - uses: julia-actions/julia-runtest@v1
       - uses: julia-actions/julia-processcoverage@v1
-      - uses: codecov/codecov-action@v5
+      - uses: codecov/codecov-action@v7
         with:
           files: lcov.info
+          use_oidc: true

README.md

@@ -1,6 +1,7 @@
 # Quadmath.jl
 
 [![CI](https://github.com/JuliaMath/Quadmath.jl/actions/workflows/CI.yml/badge.svg)](https://github.com/JuliaMath/Quadmath.jl/actions/workflows/CI.yml)
+[![Coverage](https://codecov.io/gh/JuliaMath/Quadmath.jl/branch/master/graph/badge.svg)](https://codecov.io/gh/JuliaMath/Quadmath.jl)
 
 This is a Julia interface to the IEEE 754 binary128 floating point format, backed by libquadmath (or libm for some architectures). It provides a `Float128` type and associated functionality.
 

test/runtests.jl

@@ -140,9 +140,7 @@ end
         @test abs(x) == x
         @test hypot(Float128(3),Float128(4)) == Float128(5)
         @test atan(x,x) ≈ Float128(pi) / 4
-        if !Sys.iswindows()
-            @test fma(x,x,Float128(-1.0)) ≈ Float128(1)
-        end
+        @test fma(x,x,Float128(-1.0)) ≈ Float128(1)
         @test sin(x) ≈ sin(xd)
         @test cos(x) ≈ cos(xd)
         @test all(sincos(x) .≈ (sin(x), cos(x)))