Add test for Julia project.toml in binder subdirectory

tests/julia/project-binder-dir/Manifest.toml

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+# This file is machine-generated - editing it directly is not advised
+
+julia_version = "1.8.2"
+manifest_format = "2.0"
+project_hash = "8a6b9faef104dfa92a55997106baee3560dc25bc"
+
+[[deps.IteratorInterfaceExtensions]]
+git-tree-sha1 = "a3f24677c21f5bbe9d2a714f95dcd58337fb2856"
+uuid = "82899510-4779-5014-852e-03e436cf321d"
+version = "1.0.0"

tests/julia/project-binder-dir/Project.toml

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+[deps]
+IteratorInterfaceExtensions = "82899510-4779-5014-852e-03e436cf321d"

tests/julia/project-binder-dir/binder/Manifest.toml

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+# This file is machine-generated - editing it directly is not advised
+
+julia_version = "1.8.2"
+manifest_format = "2.0"
+project_hash = "663bcf2fe6af67425c484706d7562ccb3a370117"
+
+[[deps.Adapt]]
+deps = ["LinearAlgebra"]
+git-tree-sha1 = "195c5505521008abea5aee4f96930717958eac6f"
+uuid = "79e6a3ab-5dfb-504d-930d-738a2a938a0e"
+version = "3.4.0"
+
+[[deps.Artifacts]]
+uuid = "56f22d72-fd6d-98f1-02f0-08ddc0907c33"
+
+[[deps.CompilerSupportLibraries_jll]]
+deps = ["Artifacts", "Libdl"]
+uuid = "e66e0078-7015-5450-92f7-15fbd957f2ae"
+version = "0.5.2+0"
+
+[[deps.Libdl]]
+uuid = "8f399da3-3557-5675-b5ff-fb832c97cbdb"
+
+[[deps.LinearAlgebra]]
+deps = ["Libdl", "libblastrampoline_jll"]
+uuid = "37e2e46d-f89d-539d-b4ee-838fcccc9c8e"
+
+[[deps.OpenBLAS_jll]]
+deps = ["Artifacts", "CompilerSupportLibraries_jll", "Libdl"]
+uuid = "4536629a-c528-5b80-bd46-f80d51c5b363"
+version = "0.3.20+0"
+
+[[deps.libblastrampoline_jll]]
+deps = ["Artifacts", "Libdl", "OpenBLAS_jll"]
+uuid = "8e850b90-86db-534c-a0d3-1478176c7d93"
+version = "5.1.1+0"

tests/julia/project-binder-dir/binder/Project.toml

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+[deps]
+Adapt = "79e6a3ab-5dfb-504d-930d-738a2a938a0e"

tests/julia/project-binder-dir/verify

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+#!/usr/bin/env julia
+
+if VERSION != v"1.8.2"
+    println("Julia version should be 1.8.2")
+    exit(1)
+end
+
+# Verify that the environment variables are set correctly for julia 1.0+
+@assert "julia" ∈ readdir(Sys.BINDIR)
+
+try
+    # Test that the package was installed.
+    using Adapt
+catch
+    println("Should be able to load Adapt")
+    exit(1)
+end
+
+try
+    using IteratorInterfaceExtensions
+    # Test that the package was not installed.
+    println("Should not be able to load IteratorInterfaceExtensions")
+    exit(1)
+catch
+end
+
+exit(0)