add tests and ci (#2)

* add tests and ci

* julia 1.0 compat

* add badges to readme

---------

Co-authored-by: Christopher Doris <github.com/cjdoris>

.github/workflows/tests.yml

@@ -0,0 +1,24 @@
+name: Run tests
+
+on:
+  push:
+    branches:
+      - main
+  pull_request:
+
+jobs:
+  test:
+    name: Test (julia ${{ matrix.julia-version }})
+    runs-on: ${{ matrix.os }}
+    strategy:
+      matrix:
+        julia-version: ['1.0', '1.6', '1']
+        julia-arch: [x64]
+        os: [ubuntu-latest]
+    steps:
+      - uses: actions/checkout@v4
+      - uses: julia-actions/setup-julia@v1
+        with:
+          version: ${{ matrix.julia-version }}
+          arch: ${{ matrix.julia-arch }}
+      - run: julia test/runtests.jl

README.md

@@ -1,5 +1,8 @@
 # julia-downgrade-compat
 
+[![Project Status: Active – The project has reached a stable, usable state and is being actively developed.](https://www.repostatus.org/badges/latest/active.svg)](https://www.repostatus.org/#active)
+[![Tests](https://github.com/julia-actions/julia-downgrade-compat/actions/workflows/tests.yml/badge.svg)](https://github.com/julia-actions/julia-downgrade-compat/actions/workflows/tests.yml)
+
 **Easy-peasy checking of compat lower bounds in your Julia package.**
 
 Did you set your compat entries a long time ago? Are you sure they are still accurate?

test/runtests.jl

@@ -0,0 +1,103 @@
+using Test
+
+downgrade_jl = joinpath(dirname(@__DIR__), "downgrade.jl")
+
+specs = [
+    (
+        strict = "v0",
+        ignore = "Pkg0",
+        compats = [
+            ("julia", "1.6", "1.6"),
+            ("Pkg0", "1.2", "1.2"),
+            ("Pkg1", "1", "~1.0.0"),
+            ("Pkg2", "1.2", "~1.2.0"),
+            ("Pkg3", "1.2.3", "~1.2.3"),
+            ("Pkg4", "0", "=0.0.0"),
+            ("Pkg5", "0.2", "=0.2.0"),
+            ("Pkg6", "0.2.3", "=0.2.3"),
+            ("Pkg7", "0.0.3", "=0.0.3"),
+            ("Pkg8", "0.0.0", "=0.0.0"),
+            ("Pkg9", "^1.2.3", "~1.2.3"),
+            ("Pkg10", "~1.2.3", "~1.2.3"),
+            ("Pkg11", "=1.2.3", "=1.2.3"),
+            ("Pkg12", "^1, ~2, =3", "~1.0.0"),
+            ("Pkg13_jll", "1.2.3", "~1.2.3"),
+        ]
+    )
+    (
+        strict = "true",
+        ignore = "Pkg0",
+        compats = [
+            ("julia", "1.6", "1.6"),
+            ("Pkg0", "1.2", "1.2"),
+            ("Pkg1", "1", "=1.0.0"),
+            ("Pkg2", "1.2", "=1.2.0"),
+            ("Pkg3", "1.2.3", "=1.2.3"),
+            ("Pkg4", "0", "=0.0.0"),
+            ("Pkg5", "0.2", "=0.2.0"),
+            ("Pkg6", "0.2.3", "=0.2.3"),
+            ("Pkg7", "0.0.3", "=0.0.3"),
+            ("Pkg8", "0.0.0", "=0.0.0"),
+            ("Pkg9", "^1.2.3", "=1.2.3"),
+            ("Pkg10", "~1.2.3", "=1.2.3"),
+            ("Pkg11", "=1.2.3", "=1.2.3"),
+            ("Pkg12", "^1, ~2, =3", "=1.0.0"),
+            ("Pkg13_jll", "1.2.3", "=1.2.3"),
+        ]
+    )
+    (
+        strict = "false",
+        ignore = "Pkg0",
+        compats = [
+            ("julia", "1.6", "1.6"),
+            ("Pkg0", "1.2", "1.2"),
+            ("Pkg1", "1", "~1.0.0"),
+            ("Pkg2", "1.2", "~1.2.0"),
+            ("Pkg3", "1.2.3", "~1.2.3"),
+            ("Pkg4", "0", "~0.0.0"),
+            ("Pkg5", "0.2", "~0.2.0"),
+            ("Pkg6", "0.2.3", "~0.2.3"),
+            ("Pkg7", "0.0.3", "~0.0.3"),
+            ("Pkg8", "0.0.0", "~0.0.0"),
+            ("Pkg9", "^1.2.3", "~1.2.3"),
+            ("Pkg10", "~1.2.3", "~1.2.3"),
+            ("Pkg11", "=1.2.3", "=1.2.3"),
+            ("Pkg12", "^1, ~2, =3", "~1.0.0"),
+            ("Pkg13_jll", "1.2.3", "~1.2.3"),
+        ]
+    )
+]
+
+function make_toml(compats)
+    io = IOBuffer()
+    println(io, "name = \"MyProject\"")
+    println(io)
+    println(io, "[compat]")
+    for (pkg, compat) in compats
+        println(io, pkg, " = \"", compat, "\"")
+    end
+    println(io)
+    println(io, "# some comment")
+    String(take!(io))
+end
+
+function test_downgrade(; strict, ignore, compats, file)
+    @info "testing $strict $ignore $file"
+    mktempdir() do dir
+        cd(dir) do 
+            toml1 = make_toml([(pkg, compat) for (pkg, compat, _) in compats])
+            toml2 = make_toml([(pkg, compat) for (pkg, _, compat) in compats])
+            write("Project.toml", toml1)
+            run(`$(Base.julia_cmd()) $downgrade_jl $ignore $strict`)
+            toml3 = read("Project.toml", String)
+            @test toml3 != toml1
+            @test toml3 == toml2
+        end
+    end
+end
+
+@testset "julia-downgrade-compat" begin
+    @testset "basic $(spec.strict) $(spec.ignore) $file" for spec in specs, file in ["Project.toml", "JuliaProject.toml"]
+        test_downgrade(; spec..., file=file)
+    end
+end