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Math.Tests.Sign.md

Math.Tests.Sign ​

Computes the sign of constant and time-varying inputs.

Connects a constant source with value -5 to a Sign block and verifies that sign(-5) = -1. A second Sign block is driven by a sine wave (amplitude 1) that crosses zero, exercising the +1, 0 and -1 branches.

Usage ​

BlockComponents.Math.Tests.Sign()

Behavior ​

Source ​

dyad
"""
Computes the sign of constant and time-varying inputs.

Connects a constant source with value -5 to a Sign block and verifies that
sign(-5) = -1. A second Sign block is driven by a sine wave (amplitude 1)
that crosses zero, exercising the +1, 0 and -1 branches.
"""
test component Sign
  "Constant source providing the input value"
  c1 = BlockComponents.Sources.Constant(k = -5) {
    "Dyad": {
      "placement": {
        "diagram": {"iconName": "default", "x1": 20, "y1": 20, "x2": 120, "y2": 120, "rot": 0}
      },
      "tags": []
    }
  }
  "Sine source crossing zero"
  sine = BlockComponents.Sources.Sine(amplitude = 1, frequency = 1) {
    "Dyad": {
      "placement": {
        "diagram": {"iconName": "default", "x1": 20, "y1": 140, "x2": 120, "y2": 240, "rot": 0}
      },
      "tags": []
    }
  }
  "Sign block under test"
  sign_block = BlockComponents.Math.Sign() {
    "Dyad": {
      "placement": {
        "diagram": {"iconName": "default", "x1": 170, "y1": 20, "x2": 270, "y2": 120, "rot": 0}
      },
      "tags": []
    }
  }
  "Second Sign block driven by the sine source"
  sign_block_2 = BlockComponents.Math.Sign() {
    "Dyad": {
      "placement": {
        "diagram": {"iconName": "default", "x1": 170, "y1": 140, "x2": 270, "y2": 240, "rot": 0}
      },
      "tags": []
    }
  }
relations
  connect(c1.y, sign_block.u) {"Dyad": {"edges": [{"S": 1, "M": [], "E": 2}], "renderStyle": "standard"}}
  connect(sine.y, sign_block_2.u) {"Dyad": {"edges": [{"S": 1, "M": [], "E": 2}], "renderStyle": "standard"}}
metadata {
  "Dyad": {
    "icons": {"default": "dyad://BlockComponents/Example.svg"},
    "tests": {
      "case1": {"stop": 1, "expect": {"signals": ["sign_block.y", "sign_block_2.y", "sine.y"]}}
    }
  }
}
end
Flattened Source
dyad
"""
Computes the sign of constant and time-varying inputs.

Connects a constant source with value -5 to a Sign block and verifies that
sign(-5) = -1. A second Sign block is driven by a sine wave (amplitude 1)
that crosses zero, exercising the +1, 0 and -1 branches.
"""
test component Sign
  "Constant source providing the input value"
  c1 = BlockComponents.Sources.Constant(k = -5) {
    "Dyad": {
      "placement": {
        "diagram": {"iconName": "default", "x1": 20, "y1": 20, "x2": 120, "y2": 120, "rot": 0}
      },
      "tags": []
    }
  }
  "Sine source crossing zero"
  sine = BlockComponents.Sources.Sine(amplitude = 1, frequency = 1) {
    "Dyad": {
      "placement": {
        "diagram": {"iconName": "default", "x1": 20, "y1": 140, "x2": 120, "y2": 240, "rot": 0}
      },
      "tags": []
    }
  }
  "Sign block under test"
  sign_block = BlockComponents.Math.Sign() {
    "Dyad": {
      "placement": {
        "diagram": {"iconName": "default", "x1": 170, "y1": 20, "x2": 270, "y2": 120, "rot": 0}
      },
      "tags": []
    }
  }
  "Second Sign block driven by the sine source"
  sign_block_2 = BlockComponents.Math.Sign() {
    "Dyad": {
      "placement": {
        "diagram": {"iconName": "default", "x1": 170, "y1": 140, "x2": 270, "y2": 240, "rot": 0}
      },
      "tags": []
    }
  }
relations
  connect(c1.y, sign_block.u) {"Dyad": {"edges": [{"S": 1, "M": [], "E": 2}], "renderStyle": "standard"}}
  connect(sine.y, sign_block_2.u) {"Dyad": {"edges": [{"S": 1, "M": [], "E": 2}], "renderStyle": "standard"}}
metadata {
  "Dyad": {
    "icons": {"default": "dyad://BlockComponents/Example.svg"},
    "tests": {
      "case1": {"stop": 1, "expect": {"signals": ["sign_block.y", "sign_block_2.y", "sine.y"]}}
    }
  }
}
end


Test Cases ​

Test Case case1 ​

julia
plt

julia
plt

julia
plt